Boone97

Gotcha! Thanks!

Okay, I've got to know....what's the deal with this mod? Making the gun look like it has the fun switch? Will it work with an M1 type Thompson? Inquiring Newby Minds want to know!

Well, I took some 320 sandpaper to the end of the spring, and between that and the filing I did on the side of the mag catch, I put 120 rounds through it at lunch today with no issues. I have high hopes that the mag catch Dan Block is sending me will eliminate the problem.

Well, the "new old stock" springs didn't do the trick. The problem persists. So at that point, I filed a little off the left side of the mag catch (when holding the gun in regular fashion) and it improved it a bit. Dan Block is cutting me a mag catch....I'm hoping it won't have the same problem. I understand he's downright gifted. That said, I bought the gun for reenacting, and this has been the only issue. And admittedly, it's a band-aid mod I'm doing because I'm offended by the idea of spending $70 on a new Auto Ordnance mag. It's not my SHTF gun, it's a toy, so I'm trying not to let my OCD perfectionism get to me over it.

Well, I had a couple OE springs, and they would compress so much I couldn't remove them from the mag catch after installing them just once. If I had to guess, I'd say they were just a little larger than they should have been to fit in the hole around the mag catch shaft. I cleaned up a ton of mess in the slot between the two holes. It may need some more polishing.

Dan Block is going to set me up!

I was working on this issue today with my Kahr M1SB. The two holes in the trigger frame were in fact a mess, so I cleaned those out. I'm still having the problem though. I ordered some GI springs, instead of the current production Auto Ordnance. Should they fit a bit better? Thanks!

Hi, I'm new to the forum, but have dabbled in militaria, vintage firearms and military vehicles for years. I acquired a Kahr Arms semi auto Thompson about a year and a half ago. The Form 1 came in recently, so I rebarelled it and headed to the range. I'd already cut down the mag catch to use WWII mags, which, when I could find them, were way cheaper than new ones from Kahr. Plus, I hoped to use it in WWII reenacting, so one mag wasn't going to do it. That said, my job modifying the mag catch is less than perfect. Some of the mags, especially when loaded, will drop out with any type of vibration (like firing it)! Is there anyone out there with drawings or dimensions that can cut me one that will work a bit better? I've already got a spare purchased, if someone has a recommendation on who can make me a more reliable mag catch. Thanks!