
The only important issue is that it has enough overall length for your frame. They are assembly line produced to a common plus or minus tolerance. In 30 years I have never installed one or heard of one that did not function and "time" correctly. Or you can purchase a used old model Mag cylinder usually around $75 or less of the proper vintage. It will not be the correct vintage for your old model single six, however. Now having said that, you will get a smooth, non-fluted, new model mag cylinder stamped 22 Magnum on the outside. the gun is not modified in any way, it's just a change of parts, so the original parts can always be re-installed. Keep the original action parts that Ruger returns to you with the gun for the collectability and value. Tell them you'd like a Mag cyl fitted to it and also include a note to that effect. They will send you a pre paid shipping tag and packing carton. Tell them you want the free conversion to the safety retrofit. (Monday through Friday 8:00am - 5:00pm ET) likely in the $500 range, but only if it is in 95% condition or better. This ended when the Gun Control Act of 1968 went into effect.Ĭondition dependent, (including the Magnum cylinder), your OM Single-Six is worth at least $100 more than non-duplicate S/N guns. Up until the end of 1968, if you sent your Magnum model back to Ruger, they would fit a 22 LR cylinder for a token fee. A 22 LR will fit snug in a 22 LR cylinder and loose in a Mag cylinder so it is NOT safe to shoot 22 LRs in a Mag cylinder because it will rupture the case.ĭuring the same time period as when your gun was made, 22 LR only and 22 Convertibles just had ".22 CAL" roll marked on the left side of the frame. if it chambers a 22 Mag cartridge, it is a Magnum cylinder. You might want to make sure your cylinder is for 22 LRs because it was shipped with only a Magnum cylinder. Ruger started making convertibles in 1961 with 22 LR and 22 Mag cylinders so there was a period where both the Magnum models and Convertibles were in the same serial number sequence. Duplicate serial numbers always have an interest with OM collectors. the "D" was hand stamped and the serial number was machine stamped and are usually obvious. in other words, Ruger screwed up and used the same s/n on two guns so the second one got a "D" stamped in front of the S/N. first because it was sold as a OM Magnum model (no 22 LR cylinder) and secondly because the "D" in your S/N means it was a "duplicate" serial number. Fuzzybonz, You have a nice Single-Six there.
