Semi Mag Catch Mod W/ Pics?

[smithwr3]

Some great folks have posted step by step instructions with pictures showing how to un-sporterize Saiga's and putting together stripped AR-15 lower receivers. They have really helped me out in a couple of projects. Is anyone aware of a page with pictures showing the process of how to do the mag catch mod for a semi 1927A1? Edited June 21, 2012 by smithwr3

[ghostsoldier]

It's not that hard, just a bit time-consuming, as you have to test-fit it repeatedly to make sure it works. Here's the some-what blurry before-and-after pics of mine; I used a Dremel to do it....you're basically just deepening the catch notch.

 

BEFORE

 

http://img.photobucket.com/albums/v629/ghostsoldier/My%20Impression%20stuff/My%20Weapons/BEFORE1.jpg

http://img.photobucket.com/albums/v629/ghostsoldier/My%20Impression%20stuff/My%20Weapons/BEFORE2.jpg

 

AFTER

http://img.photobucket.com/albums/v629/ghostsoldier/My%20Impression%20stuff/My%20Weapons/AFTER1.jpg

http://img.photobucket.com/albums/v629/ghostsoldier/My%20Impression%20stuff/My%20Weapons/AFTER2.jpg

http://img.photobucket.com/albums/v629/ghostsoldier/My%20Impression%20stuff/My%20Weapons/AFTER3.jpg

http://img.photobucket.com/albums/v629/ghostsoldier/My%20Impression%20stuff/My%20Weapons/AFTER4.jpg

 

Hope these help.

 

Rob

[dalbert]

smithwr3 and ghostsoldier,

 

Thank you for the suggestion, and the follow-up to the suggestion in this post. I have just added this thread to the pinned reference section at the top of the page.

 

Thanks!

 

David Albert

dalbert@sturmgewehr.com

[darrylta]

Ghostsolider,

That's some fine work with a Dremel drill. I'm in the camp of

calling this tool,,,Watch Me F#*K This Up tool. I used files to

do my son's 27.

-Darryl

[ghostsoldier]

No problem, guys...glad I could help.

Rob

[pitfighter]

Great help -

 

If we wanted to retain the 1927A1 mag catch as it was?

 

Would a 1928 SMG Mag catch also work as a drop in replacement?

 

Thanks,

 

Pit.

[Gio]

pitfighter,

 

Yes the 1928 mag catch will work in a 1927A1. The pics in this post a great. I would recomend printing them and when modifying yours they make a good reference.

 

Good luck

Frank

[SecondAmend]

To get the catch modification to hold reliably on most of the unmodified mags that I have, I had to grind down slightly more (about 1/2 mm) than shown in the 'ghostsoldier' photos. And I have a few Crosby mags (known to have out of spec issues) that do not reliably hold even with the additional material removal. All the non-Crosby and some of the Crosby latch and hold. It took about five tries of only removing a little at a time to get to get the modified catch to "catch".

 

Best of luck with your project.

[pitfighter]

Thank you - I will buy one and grind slowly, checking regularly.

 

I received one Auto-Ordnance semi-mag with the 1927A1 -and have a dozen or so unaltered surplus 30 rounders.

 

This is my first Thompson variation, so moving slowly - my thing has always been German firearms.

But, harboring an obsession with the American Gangster since an early age I realized it was just a matter of time before I crumbled and bought one.

Looking at Tommygunner's easy pull springs, fitting the quick detach stock system, redoing the wood, and altering the selector to work as a bolt hold open, or third hand in drum replacement - fun!

 

Pit.

In the land of no class three.

[Jim W]

As the photos in the post by Ghostsoldier no longer seem to show, I am taking the liberty of redoing his post, with the photos that were still hosted on Photobucket, but no longer link:

 

It's not that hard, just a bit time-consuming, as you have to test-fit it repeatedly to make sure it works. Here's the some-what blurry before-and-after pics of mine; I used a Dremel to do it....you're basically just deepening the catch notch.

 

BEFORE

 

AFTER

Hope these help. 

 

I also thought these markups might help:

Before:

 

After: