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.22 automatic frame types

This is a discussion on .22 automatic frame types within the Ruger Rimfires forums, part of the Pistol & Revolver Forum category; As I am not that familiar with Ruger .22 automatic pistol lore, I understand there were several different frame types - pre-1971, the A100, and ...


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Old May 9th, 2017, 04:18 PM   #1
 
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.22 automatic frame types

As I am not that familiar with Ruger .22 automatic pistol lore, I understand there were several different frame types - pre-1971, the A100, and something later than the A100. As a recent latest owner of a ca. 1955 Standard Model, I am a little curious. Mine has nothing stamped anywhere on the frame itself. So were all frames made prior to the A100 unstamped with the frame type? And what were the early frames called? I guess what I am really asking for is the chronology of .22 automatic frame types.



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Old May 9th, 2017, 04:41 PM   #2
 
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I believe the old ones are an A-54 grip frame, no idea if they are stamped or not, but that's what they are called. The one major difference I know of is the magazine follower button is on the opposite side (RH side I think) of the newer A-100 frames.

You should be able to use a modern MKII mag if you have an A-54 frame, you'll just have to take the mag apart and swap the button to the other side.
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Old May 9th, 2017, 05:41 PM   #3
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The first frame was an A-54 and was used on the early Standard and MK I. It was replaced by the A-100 frame, which was used for later production Standards and MK Is. When the MK II came out, it had a different frame but I don't think it had a number. MK IIs were available in a Standard with fixed sights and Target models with adjustable sights. This frame had to accommodate the new bolt lock back system. The MK III frame was different because the magazine release was moved from the heel of the butt to just behind the trigger. It also had a hole for a key operated lock. Meantime the first 22/45s came out with a polymer frame with the grips cast in the grip frame. Later models had removable grips. The MK III 22/45 magazine well was changed to accommodate a slightly different magazine base. The MK III 22/45 also had a key lock. Now we have a MK IV with a totally different grip frame. It looks similar but is hinged in front so the barrel assembly can be removed by just pushing a button and the mainspring housing is not removable. I'm probably forgetting a few .... considering the MK Series pistols have been made in more configurations than any other pistol.
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Old May 9th, 2017, 06:03 PM   #4
 
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Thanks. Finding that the earlier Standard Models had the A-54 frame helped. I did a search on "A-54" here and found one thread with a posting which said that the A-54 frames were not stamped, but the A-100 frames were. So I guess that makes my 1955 Standard Model correct, as it has no stamping. At this point, I think I understand the magazine situation pretty well, and have already modified a Mark II mag to fit my Standard. I have one of the early original chrome-plated metal bottom mags for my Standard Model with a zig-zag follower spring, but the spring in it is too weak to function. I have been trying to locate a new or NOS replacement spring for it, but so far, no luck whatsoever. It seems those springs are extinct or at best an endangered species.
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Old May 9th, 2017, 07:06 PM   #5
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DWalt, There are other brands of 22 LR pistols that use a zig-zag spring that might fit or .... Brownell's sells an original MK I/Standard 9 round magazine for 25 bucks. Here's a link: Mark I Target & Standard | World's Largest Supplier of Firearm Accessories, Gun Parts and Gunsmithing Tools - BROWNELLS
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Old May 9th, 2017, 09:08 PM   #6
 
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Unfortunately, the magazine pictured in Brownell's catalog is not one of the original magazines. While it will work in a Standard or Mark I, it is really a Mark II magazine with the coil spring. There is a substantial difference.
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Old May 9th, 2017, 10:12 PM   #7
 
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The zig zag spring magazines were not able to move the button to the left side and were for the A-54 frame models. The 9 round magazines with coil springs and the ability to put the button on either side came out with the A-100 frames.

This is what Brownells describes in the ad, but what is shown is a 10 round mark 2 magazine. The 9 round followers were grey and had a longer post fitting into the spring. I'm not sure what they are actually selling since the description and picture don't match.
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Old May 10th, 2017, 06:25 AM   #8
 
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I suggest posting a WTB ad here on the forum.
Also I have had good luck finding hard to find magazines on Gunbroker.
Reasonable prices also as I have bought several Ruger and S&W
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Old May 10th, 2017, 06:47 AM   #9
 
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eBay and GunBroker have lots of used original A-54 magazines listed. But I am hesitant to buy any of them as there is no assurance that their follower springs are any stronger than the one I already have. Therefore I'd prefer to find a new or NOS replacement spring alone.
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