Ruger single six convertible serial numbers

It's a very early one and with a 4 digit serial # it was made the 2nd year of production, 1954 in .22 LR. Those early models known as the old model with 3 screws thru the cylinder frame were made before 1973. First known as the Ruger Revolver and Ruger Single Six Model until 1955, they all had a 5 1/2" barrel and black hard rubber grips.

No matter the brand or size of your piano, it has been assigned a serial number. Some companies or models may have the number in different places but each one should have identifyi...Single-Six Standard Model Revolver (Manufactured from 1953 to 1973) Caliber: 22 LR; Beginning Serial Number: Years of Production: 1: 1953: 50: 1954: 10734: 1955: 31857: 1956: 55346: 1957: 88245: 1958: 122480: 1959: 151189: 1960: 171403: 1961: 187367: 1962: 20-00001: 1969: 20-39803: 1970: 20-77705: 1971: 21-16995: 1972: 21-53819: 1973RUGER. RUGER SINGLE SIX 3 SCREW 1971 22/22MAG. $650.99. Used. Very Good. Add to Cart. See Details. Search the Guns.com database to shop for guns, ammo, mags, optics and more. Filter products to ...27.9 cm. Weight38 oz. 1.07 kg. Grooves6. Available in CAYes. Available in MAYes. UPC7-36676-08100-4. Suggested Retail$919.00. Windage- and elevation-adjustable rear sights help put you on target and keep you there.Enter your Ruger® serial number above to view its model number, product line, caliber, production status, ship date and instruction manual. Note: This service is provided as reference only, and accuracy is not guaranteed. For specific questions or additional information, please contact Customer Service . For Letters of Authenticity, please ...Enter your Ruger® serial number above to view its model number, product line, caliber, production status, ship date and instruction manual. Note: This service is provided as reference only, and accuracy is not guaranteed. For specific questions or additional information, please contact Customer Service . For Letters of Authenticity, please ...GKP503, Ruger's standard OM Single-Six barrel lengths are 4 5/8", 5 1/2", 6 1/2" and 9 1/2" so yours is a 5 1/2". Barrel length for all revolvers is measured from the front face of the cylinder to the muzzle. Without seeing your gun, it would be difficult to appraise it because there are several things that affect value.

Single-Six Magnum Model Revolver (Manufactured from 1959 to 1969) Caliber: 22 Magnum; Beginning Serial Number: Years of Production: 300001: 1959: 305543: 1960: 318696: 1961: 331116: 1962: 351442: 1963: 380392: 1964: 409921: 1965: 434541: 1966: 475650: 1967: 490279: 1968: 824407: 1969The Standard Model, at $41.50 was well under the $71.50 sticker on the Colt Huntsman. The Single-Six Convertible (the interchangeable .22 Magnum cylinder came along in 1962) was $69.50, still under the $82.50 sticker on Colt’s two-cylinder Frontier Scout rimfire. Of course, none of this late ’60s MSRP argle-bargle mattered much to me at the ...Serial Number Lookup; ... New Model Single-Six ... Ruger offers consumers almost 800 variations of more than 40 product lines, across both the Ruger and Marlin brands. For 75 years, Sturm, Ruger & Co., Inc. has been a model of corporate and community responsibility. Our motto, "Arms Makers for Responsible Citizens®," echoes our …Model: SINGLE SIX BUNTLINE Serial Number: 262-44729 Barrel Length: 9-1/2 Condition: USED . See all listings by Brandons Gun Trading Co Print this listing. ... RUGER, SINGLE SIX, CONVERTIBLE 22LR-22MAG, 9-1/2” BUNTLINE SIX SHOT REVOLVER Description: THIS IS A RUGER, SINGLE SIX, CONVERTIBLE 22LR …Attached are two screenshots of the info that popped up when i searched the serial numbers on Rugers website. The Single Seven (327) says it's not in production, but their website still shows a Single Seven in their product line up. ... The Single Six convertible (22 lr / wmrf) model number #00668 doesn't show up on their website what … Overall Length13". Weight45 oz. Grooves6. Available in CAYes. Available in MAYes. UPC7-36676-00662-5. Suggested Retail$1139.00. Windage- and elevation-adjustable rear sights help put you on target and keep you there. Chambered for affordable rimfire shooting. Overall Length13". Weight45 oz. Grooves6. Available in CAYes. Available in MAYes. UPC7-36676-00662-5. Suggested Retail$1139.00. Windage- and elevation-adjustable rear sights help put you on target and keep you there. Chambered for affordable rimfire shooting. So you stated that Ruger used the same serial number sequence back with the Single 6 revolvers, no matter the model, but in RL Wilsons book on Bill and his Rugers, Wilson has the standard Single Six Convertible (fixed rear sight and half-moon front sight) models, the Magnum only, and the Super Single 6 convertible models all with different ...

Looking at the serial number that you list I believe that it is a Single-Six convertible that originally came with a .22 Caliber (S, L,& LR) cylinder and a .22 …The 272 is the end of the Single Six's serial number. I expect (guess) the "D" indicates Dual cylinders. ... Thus the "Convertible" was born. However, as noted above, there are a few "star" marked guns which are 22.lr only. ... Before 1968 you could have found a Ruger Single Six, Super Blackhawk, 10/22, etc and they could all have had the …RUGER OLD MODEL “SINGLE-SIX” REVOLVER. PRODUCED 1953 - 1972. GENERAL OVERVIEW. Sturm, Ruger & Co. introduced its first single action revolver in June 1953. It was a six-shot .22 caliber called the “Single-Six”. Bill Ruger had recognized that, due to the popularity of the early 1950’s TV and movie westerns, a “cowboy type” gun ...Handsome, larger crescent-shaped ejector rod head boasts traditional form, perfect for every cowboy or cowgirl. Cold hammer-forged barrel results in ultra-precise rifling that provides exceptional accuracy and longevity. Blade front and integral notch rear sights. Models chambered in .357 Magnum also accept factory .38 Special cartridges.

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New Model Single-Six ® revolvers are the perfect small bore single-action revolver for plinking, small game hunting or serious competition. Windage- and elevation-adjustable rear sights help put you on target and keep you there. Chambered for affordable rimfire shooting. Transfer bar mechanism and loading gate interlock provide an unparalleled ... Overall Length13". Weight45 oz. Grooves6. Available in CAYes. Available in MAYes. UPC7-36676-00662-5. Suggested Retail$1139.00. Windage- and elevation-adjustable rear sights help put you on target and keep you there. Chambered for affordable rimfire shooting. The Ruger Single Six for sale is the most versatile revolver in the industry with a convertible design that delivers two caliber capability in one dependable package. With the simple change of a cylinder, the Ruger Single Six revolver transforms from a 22 LR to a 22 WMR and features windage and elevation adjustable rear sights, a precisely ... Beginning Serial Number: Years of Production: 32-33639: 1974: 32-66489: 1975: 33-03854: 1976: 33-51451: ... Ruger does not necessarily produce firearms in serial ...

Single-Six Standard Model Revolver (Manufactured from 1953 to 1973) Caliber: 22 LR; Beginning Serial Number: Years of Production: 1: 1953: 50: 1954: 10734: 1955: 31857: 1956: 55346: 1957: 88245: 1958: 122480: 1959: 151189: 1960: 171403: 1961: …The Ruger Single-Six began selling to the public in July of that year. By the end of the year, only about 100 Single-Sixes had made it to dealers’ shelves. Demand for the Single-Six steadily ...Usually, serial numbers can be found engraved on the back of the watch case. The serial numbers identify the age of the watch. Some watches have the serial numbers on the inside mo...Overall Length12". Weight40 oz. Grooves6. Available in CAYes. Available in MAYes. UPC7-36676-00626-7. Suggested Retail$919.00. Windage- and elevation-adjustable rear sights help put you on target and keep you there. Chambered for affordable rimfire shooting. In 1959 when Ruger came out with the Single-Six with a 6 1/2 in. bl. instead of calling it a RSS6, they call it a RSSM as that gun was only made in a .22 Mag. The M stands for Magnum. After they started making in in a convertible they still called it a RSSM. So all 6 1/2 in Single-Sixes on the Ruger serial number web site are listed as magnum ... Nice Ruger Single Six. It is likely unfired and has been Converted to the Safety bar. It was made as a 22 LR only. Ruger made the Convertible Single Six at serial # 150,000 with …1971. 60-81278. 1972. An Old Model Super Single Six most likely has a 6.5" barrel (didn't say) and adjustable rear sight along with the fancy front sight (didn't say). One picture would have told a lot. Marlins: 1951 336RC .30-30 - 1951 39A "Peanut" - 1988 Model 60 (22" blued) - 1982 783 22WMR.What year or serial number did the cylinders of the convertible 22 models change to the unfluted cylinder for the 22WMR and was the last 3 digits of the serial number only stamped on cylinders after this production date? I am looking at an advert of a new model single six with both the 22lr and the 22WMR cylinders that are fluted.

The OM Single-Six Convertibles started in 1961 with the serial number of; 162xxx and went to 1973 with a serial number of 21-56105. (Per RENE.) In 1967 the …

$302.00 - Used.22 WMR SINGLE-SIX RUGER OLD MODEL SINGLE SIX MAGNUM 3 SCREW WRM 6-1/2" 1961 6 INCH " BARREL Sold Location: Myerstown, PA 17067 Sold Date: 5/1/2024 12:00:00 AM: $425.00 - Used.22 WMR SINGLE-SIX CONVERTIBLE RUGER SINGLE SIX CONVERTIBLE .01 NR Sold Location: Red Oak, TX 75154 Sold Date: 5/1/2024 12:00:00 AM In 1959 when Ruger came out with the Single-Six with a 6 1/2 in. bl. instead of calling it a RSS6, they call it a RSSM as that gun was only made in a .22 Mag. The M stands for Magnum. After they started making in in a convertible they still called it a RSSM. So all 6 1/2 in Single-Sixes on the Ruger serial number web site are listed as magnum ... Just saw a complete Old Model Single Six box complete with all paperwork and receipt for the gun dated 1967 .Marked RSS5 ,same box as above and receipt says .22LR /.22WMR Ruger Single Six. The White box with red lettering for WMR cylinder is correct too. So only thing suspect really is over written serial . fourbore.New Model Single-Six ® revolvers are the perfect small bore single-action revolver for plinking, small game hunting or serious competition. Windage- and elevation-adjustable rear sights (available on most models) help put you on target and keep you there. Transfer bar mechanism and loading gate interlock provide an unparalleled measure of ... Weight39 oz. 1.10 kg. Grooves6. Available in CAYes. Available in MANo. UPC7-36676-00676-2. Windage- and elevation-adjustable rear sights help put you on target and keep you there. Chambered for affordable rimfire shooting. Transfer bar mechanism and loading gate interlock provide an unparalleled measure of security against accidental discharge. Overall Length12". Weight39 oz. Grooves6. Available in CAYes. Available in MANo. UPC7-36676-06538-7. Windage- and elevation-adjustable rear sights (available on most models) help put you on target and keep you there. Chambered for affordable rimfire shooting. Transfer bar mechanism and loading gate interlock provide an unparalleled measure of ... New Model Single-Six. Family. Windage- and elevation-adjustable rear sights (available on most models) help put you on target and keep you there. Chambered for affordable rimfire shooting. Transfer bar mechanism and loading gate interlock provide an unparalleled measure of security against accidental discharge.

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FinishSatin Stainless. Overall Length11". Weight39 oz. Grooves6. Available in CAYes. Available in MAYes. UPC7-36676-00625-0. Suggested Retail$919.00. Windage- and elevation-adjustable rear sights help put you on target and keep you there.Shooting and discussing a vintage Ruger Single-Six.----- Hickok45 videos are filmed on my own private shooting range and property by train...The Standard Model, at $41.50 was well under the $71.50 sticker on the Colt Huntsman. The Single-Six Convertible (the interchangeable .22 Magnum cylinder came along in 1962) was $69.50, still under the $82.50 sticker on Colt’s two-cylinder Frontier Scout rimfire. Of course, none of this late ’60s MSRP argle-bargle mattered much to me at the ...The Ruger Single-Six began selling to the public in July of that year. By the end of the year, only about 100 Single-Sixes had made it to dealers’ shelves. Demand for the Single-Six steadily ...New Model Single-Six - SSM Revolver (Manufactured from 1984-2015) Caliber: 32 H&R Mag; Beginning Serial Number: Years of Production: 650-00001: 1984: 650-03481: …20-77705. 1971. 21-16995. 1972. 21-53819. 1973. The above chart shows the approximate first serial number shipped for the indicated year. This number should be used as a point of reference only. It is not necessarily the very first serial number shipped, but it can be used to determine the approximate year your Ruger firearm was shipped.To celebrate 50 years of the .357 Mag. “Flattop” Blackhawk, Sturm, Ruger & Co. produced the 50th Anniversary New Model Blackhawk, NVB34-50. Serial numbers start at 520-00001, and those ...Three frame screws identify the 'old model' (pre-1973) Single Six®, Blackhawk® and Super Blackhawk® revolvers. Serial numbers below 93-00000 identify old Bearcat® and Super Bearcat® models. If your revolver has the words 'New Model', 'Bisley', 'Vaquero', or 'Old Army' on the frame, this offer is not applicable.I will say though that between what is stamped on the box and the serial number indicating it is a Ruger Super Single Six Convertible (dual 22 LR and 22 Magnum cylinders) and you say this is the box your relative received the revolver in that mix-ups do happen. ... Did find online Ruger Companies serial number/production chart for the …Dec 25, 2566 BE ... #Ruger security six serial number location serial number ... For those models that ship with both cylinders, the last 3 digits of the serial ...May 4, 2564 BE ... The Ruger Single Six was introduced in 1953 and is still a popular single action revolver. A lot of options with barrel length, ...Also, within a model family the same serial number prefix may be used to produce a variety of different models, all in the same block of serial numbers. And in some cases, firearms may be stored for a length of time before they are shipped. For details on your specific serial number you may contact our Service Department: 336-949-5200 ….

Usually, serial numbers can be found engraved on the back of the watch case. The serial numbers identify the age of the watch. Some watches have the serial numbers on the inside mo...New Model Single-Six ® revolvers are the perfect small bore single-action revolver for plinking, small game hunting or serious competition. Windage- and elevation-adjustable rear sights (available on most models) help put you on target and keep you there. Chambered for affordable rimfire shooting. Transfer bar mechanism and loading gate ...In October of 1955 the slot in the ejector housing was lengthened, to allow for its concurrent use on the then-new .357 Blackhawk revolver. In October of 1956, the small button on the ejector rod was replaced with a larger non-serrated button. In 1956 and 1957, lightweight aluminum-frame Single Sixes were offered.Single-Six Magnum Model Revolver (Manufactured from 1959 to 1969) Caliber: 22 Magnum; Beginning Serial Number: Years of Production: 300001: 1959: 305543: 1960: 318696: 1961: 331116: 1962: 351442: 1963: 380392: 1964: 409921: 1965: 434541: ... Ruger does not necessarily produce firearms in serial number order. There are occasions …Typically used to identify tangible and intangible consumer goods, serial numbers are made up of a series of numbers (and sometimes letters and characters) that are unique to that ...Handsome, larger crescent-shaped ejector rod head boasts traditional form, perfect for every cowboy or cowgirl. Cold hammer-forged barrel results in ultra-precise rifling that provides exceptional accuracy and longevity. Blade front and integral notch rear sights. Models chambered in .357 Magnum also accept factory .38 Special cartridges. The mechanism of the RUGER ® NEW MODEL SINGLE-SIX ®* differs significantly from that of any other single-action revolver. The information and instructions which follow apply only to the New Model Single-Six ®* revol . The 10-shot RUGER ® SINGLE-TEN ® and the 9-shot RUGER ® SINGLE-NINE ® revolvers have many of the features of the New ... Ruger Single-Six Convertible Stainless 4.62" Revolver 22 WMR 6 RD. $652.00 (Save up to 19%) Price. $525.00. 0627. Ruger. Ruger Single Six Revolver – Still One of the Best Handguns to Own. ... Ruger Super Single Six Serial Number History - Sturm, Ruger & Co. No. In 1973 when the New Model Super Single-Six came out it …Transcript: 00:00 the ruger old model single six let’s check it out [Music] [Music] [Music] [Music] the river single six was introduced in 01:10 1953 and is still currently being made these were originally chambered in 22 long rifle but they also are chambered in 22 magnum and 17 hmr there have been a number of differences over the years in fact … Ruger single six convertible serial numbers, There are multiple reasons you might need to obtain the IMEI number of your phone. It is equivalent to the serial number and it identifies the make and model of device you own. You..., I have a ruger.22cal single-six 3 screw revolver I bought new in 1967 no papers or box. shot maybe 100 rounds probably less serial#430286. value, I have one with the ser number 48xxx. I paid $75.00 for one in 1963. Have been researching for another one., Enter your Ruger® serial number above to view its model number, product line, caliber, production status, ship date and instruction manual. Note: This service is provided as reference only, and accuracy is not guaranteed. For specific questions or additional information, please contact Customer Service . For Letters of Authenticity, please ..., Single-Six Magnum Model Revolver (Manufactured from 1959 to 1969) Caliber: 22 Magnum; Beginning Serial Number: Years of Production: 300001: 1959: 305543: 1960: 318696: 1961: 331116: 1962: 351442: 1963: 380392: 1964: 409921: 1965: 434541: ... Ruger does not necessarily produce firearms in serial number order. There are occasions …, The Single-Six was Sturm, Ruger & Company’s second commercial design, following 1949’s semiautomatic Ruger .22 pistol that would later be renamed the Standard (which is now in its fourth generation). The first Single-Six was produced in 1953, and capitalized on the tremendous interest in “cowboy guns” that was being generated by the ..., New Model Single-Six; New Model Blackhawk; New ... Convertible · Standard · New Model Blackhawk · Blued ... These models bear serial numbers beginning with&nbs..., 1970. 60-52410. 1971. 60-81278. 1972. The above chart shows the approximate first serial number shipped for the indicated year. This number should be used as a point of reference only. It is not necessarily the very first serial number shipped, but it can be used to determine the approximate year your Ruger firearm was shipped. , New Model Single-Six Colorado Centennial Revolver. Caliber: 22 LR. Beginning Serial Number: Years of Production: 76-00001. 1976. The above chart shows the approximate first serial number shipped for the indicated year. This number should be used as a point of reference only. It is not necessarily the very first serial number shipped, but it can ..., January 20, 2003. Development and Design. Ruger is proud to introduce a special edition New Model Single Six to commemorate the 50th anniversary of Ruger's Single Six .22 caliber revolver. This 50th Anniversary Single Six will feature a 4 5/8" barrel with a unique gold color enhanced rollmark "50 years of Single Six 1953 to 2003", a blued steel ..., TALO Distributor Exclusive. Availability: Limited Availability Model Number: 0683 Caliber: 22 LR / 22 WMR Grips Star Checkered Hardwood; Front Sight Ramp; Barrel Length 5.50" 13.9 cm, It's a very early one and with a 4 digit serial # it was made the 2nd year of production, 1954 in .22 LR. Those early models known as the old model with 3 screws thru the cylinder frame were made before 1973. First known as the Ruger Revolver and Ruger Single Six Model until 1955, they all had a 5 1/2" barrel and black hard rubber grips., The Ruger Single Six for sale is the most versatile revolver in the industry with a convertible design that delivers two caliber capability in one dependable package. With the simple change of a cylinder, the Ruger Single Six revolver transforms from a 22 LR to a 22 WMR and features windage and elevation adjustable rear sights, a precisely ..., The Single-Six .22 Magnum marked guns also came with a .22 LR cylinder during production. According to the RENE Guide, A "RSSMX" (X being the addition of a .22 LR cylinder,) had a few variations during it's production. One, a serial number range of 308310 to 339003 was from 1960 to 1960 with about 5000 made. the next variation was in the range ..., For sale is a Ruger Single Six revolver in .22 Mag. Serial number - 67-96501. MFG Dated: 1980. ... The rugged reliability and the safe carrying characteristics of the Ruger Single-Six Convertible Single-Action Revolver make it a superb sidearm to take along on most outdoor adventures, including backpacking, fishing, and big game hunting ..., Model: SINGLE SIX BUNTLINE Serial Number: 262-44729 Barrel Length: 9-1/2 Condition: USED . See all listings by Brandons Gun Trading Co Print this listing. ... RUGER, SINGLE SIX, CONVERTIBLE 22LR-22MAG, 9-1/2” BUNTLINE SIX SHOT REVOLVER Description: THIS IS A RUGER, SINGLE SIX, CONVERTIBLE 22LR …, The 272 is the end of the Single Six's serial number. I expect (guess) the "D" indicates Dual cylinders. ... Thus the "Convertible" was born. However, as noted above, there are a few "star" marked guns which are 22.lr only. ... Before 1968 you could have found a Ruger Single Six, Super Blackhawk, 10/22, etc and they could all have had the …, Beginning Serial Number: Years of Production: 32-33639: 1974: 32-66489: 1975: 33-03854: 1976: 33-51451: ... Ruger does not necessarily produce firearms in serial ..., Whalerman Discussion starter. 68 posts · Joined 2017. #1 · May 3, 2019. Until this week, every time I looked up a serial number, Ruger's web site presented me with a table (list) of a models' numbers and approximate date of manufacture. They've changed that. Now I'm shown a field to enter the serial number and the web site comes back with the ..., The new value of a RUGER SINGLE SIX CONVERTIBLE pistol has risen $56.84 dollars over the past 12 months to a price of $601.71 . The used value of a RUGER SINGLE SIX CONVERTIBLE pistol has fallen ($47.57) dollars over the past 12 months to a price of $446.83 . The demand of new RUGER SINGLE SIX CONVERTIBLE pistol's has fallen 5 …, Handsome, larger crescent-shaped ejector rod head boasts traditional form, perfect for every cowboy or cowgirl. Cold hammer-forged barrel results in ultra-precise rifling that provides exceptional accuracy and longevity. Blade front and integral notch rear sights. Models chambered in .357 Magnum also accept factory .38 Special cartridges., 2,455. Location. Vinton, VA. [email protected] said: Ruger came through with the model, caliber, barrel length and date it shipped from factory. Bill. That gun, as Hondo44 said, could be a standard Ruger Auto, with a 4 3/4 in. bl. or a Single-Six with a 5 1/2 in bl. or a Bearcat. All three guns would have that serial number., Overall Length10.25". Weight32 oz. Grooves6. Available in CAYes. Available in MAYes. UPC7-36676-00623-6. Suggested Retail$829.00. Windage- and elevation-adjustable rear sights help put you on target and keep you there. Chambered for affordable rimfire shooting., Handsome, larger crescent-shaped ejector rod head boasts traditional form, perfect for every cowboy or cowgirl. Cold hammer-forged barrel results in ultra-precise rifling that provides exceptional accuracy and longevity. Blade front and integral notch rear sights. Models chambered in .357 Magnum also accept factory .38 Special cartridges., 1957. 209565. 1958. 212367. 1959. The above chart shows the approximate first serial number shipped for the indicated year. This number should be used as a point of reference only. It is not necessarily the very first serial number shipped, but it can be used to determine the approximate year your Ruger firearm was shipped., 20 posts · Joined 2019. #1 · Mar 4, 2020. Some years ago I purchased a Ruger New Model Convertable Single Six and now I would like to find out when it was made. The serial number 260-0100 does not show up on any of Ruger's date of manufacture lists. The closest is 260-23867=1984 so I am thinking this gun might have been built prior to 1984 ..., For those models that ship with both cylinders, the last 3 digits of the serial number are engraved on the front of the cylinder; only cylinders that have been properly timed should be used with any given revolver., Overall Length12". Weight35 oz. Grooves6. Available in CAYes. Available in MAYes. UPC7-36676-00622-9. Suggested Retail$829.00. Windage- and elevation-adjustable rear sights help put you on target and keep you there. Chambered for affordable rimfire shooting. , Overall Length12". Weight40 oz. Grooves6. Available in CAYes. Available in MAYes. UPC7-36676-00626-7. Suggested Retail$919.00. Windage- and elevation-adjustable rear sights help put you on target and keep you there. Chambered for affordable rimfire shooting., Serial ports have been an important I/O tool for decades. Learn how they work! Advertisement Considered to be one of the most basic external connections to a computer, the serial p..., 1970. 60-52410. 1971. 60-81278. 1972. The above chart shows the approximate first serial number shipped for the indicated year. This number should be used as a point of reference only. It is not necessarily the very first serial number shipped, but it can be used to determine the approximate year your Ruger firearm was shipped., 1.19 kg. Grooves8. Available in CAYes. Available in MAYes. UPC7-36676-00308-2. Suggested Retail$979.00. Traditional western-style, hand-filling grip has long been acknowledged as one of the most comfortable and natural pointing of any grip style. Target-grade accuracy with ramp front and adjustable rear sights., Dec 25, 2566 BE ... #Ruger security six serial number location serial number ... For those models that ship with both cylinders, the last 3 digits of the serial ..., In 1959 when Ruger came out with the Single-Six with a 6 1/2 in. bl. instead of calling it a RSS6, they call it a RSSM as that gun was only made in a .22 Mag. The M stands for Magnum. After they started making in in a convertible they still called it a RSSM. So all 6 1/2 in Single-Sixes on the Ruger serial number web site are listed as magnum ...