huggytree Posted May 11, 2018 Report Share Posted May 11, 2018 is there such a thing as a mp40 that has no up/down slop? in 1940 anyone think there wasnt some play?...what is the ultimate goal to achieve ive got a new bushing and filed it down...i still ended up with about 1" of up/down slop..i read about a trick to use feeler gauges around the button to eliminate the slop between the button and the stock arms...i was able to fit a .005 and a .001 in it....pretty cool trick if you have not heard of it..you use the hole thats in the feeler gauge and run the pin through it...when installed you cant see the shim....this knocked my wiggle down to approx 5/8-3/4....the button now needs muscle to push it in....but it snaps out just fine... ive got 2 new bushings coming....im going to attempt to file the next one down even tighter....i think 0 slop would = a non functioning button... curious if anyone else has messed with these new bushings and other tricks to eliminate the slop my gun was probably 2" of slop originally and freely flopped up/down....now its tight.....you need muscle to move it the 3/4 remaining slop up/down Link to comment Share on other sites More sharing options...
BillyDixon Posted May 12, 2018 Report Share Posted May 12, 2018 years ago in europe i inspected a batch of mp-40 that were in a police dept, since ww2, in fact some were clogged with grease and no body in the dept ever rembered them being taken out of the storage locker, all were probally un fired and fanyastic condition. and all the stocks had the up and down play you describe. Link to comment Share on other sites More sharing options...
geefal Posted May 12, 2018 Report Share Posted May 12, 2018 Mine has no movement whatsoever any direction, locks up dead tight. Link to comment Share on other sites More sharing options...
TSMGguy Posted May 12, 2018 Report Share Posted May 12, 2018 I'll just go with what I see on my all matching bnz 41 example. The gun has no wear and has never been disassembled past field strip. There's some slop in the stock, whether it's locked open or closed. This was also true of every other MP-40 I ever examined, so I'd call it a characteristic of the breed. I wouldn't worry about it or use it to decide on purchasing one gun over another. I certainly wouldn't try to "correct" it. Link to comment Share on other sites More sharing options...
RoscoeTurner Posted May 12, 2018 Report Share Posted May 12, 2018 If it isn't broke, keep fixing it until it is. Link to comment Share on other sites More sharing options...
huggytree Posted May 12, 2018 Author Report Share Posted May 12, 2018 when you have 2"+ slop and its flopping in the breeze just by shaking the gun i think it needs some help a couple of tweaks and im down to it being very firm and 3/4".....im thinking im calling it GTG at this point.....ive shot mine 2x and it was flopping against my shoulder whereas i could feel it......did it effect accuracy? at 15 yard i still never missed the 8" circle the feel gauge trick was well worth it!...took 5 minutes, some parts off my feeler gauge which i rarely use anyways...and it gained me 1/4" less slop Link to comment Share on other sites More sharing options...
Petroleum 1 Posted May 12, 2018 Report Share Posted May 12, 2018 (edited) I replaced the bushing and also put a fine layer of silver solder on the button tabs then filed it to a perfect fit. The button wont pop out unless there is a little play in the notches so basically you end up reintroducing a little slop in the up down movement just to get the button to work normally. My stock probably has between a 1/16" and 1/8th" of play and that is about the best I can get. Edited May 12, 2018 by Petroleum 1 Link to comment Share on other sites More sharing options...
Haenelistklasse Posted May 13, 2018 Report Share Posted May 13, 2018 My 122 40 coded gun (all matching) does have some slop but I will not try to fix it. I also have an ayf 43 coded gun (mismatched, reblued gun) that has the tightest stock I have ever seen on an MP40. I don't know how they fixed it but they did. I also owned an Erb tube gun built on an fxo 41 parts kit and that also had slop. I never tried to repair it. I would have to agree with one of the other posters, it is just a part of owning an MP40. Pretty much every MP40 I have ever handled has this slop except for the ayf 43 gun that I own. Link to comment Share on other sites More sharing options...
taeelec Posted May 14, 2018 Report Share Posted May 14, 2018 My ayf 43 locks up tight with no play. My bnz 41 also locks up tight but with force you can move it maybe a 1/4". Both are original finish WW2 bringbacks. A friend's original fxo 42 does have about 1/2" of play. I believe that it's not uncommon for most MP40s to have some degree of stock vertical play. Todd in Oregon Link to comment Share on other sites More sharing options...
Petroleum 1 Posted May 14, 2018 Report Share Posted May 14, 2018 My ayf 43 locks up tight with no play. My bnz 41 also locks up tight but with force you can move it maybe a 1/4". Both are original finish WW2 bringbacks. A friend's original fxo 42 does have about 1/2" of play. I believe that it's not uncommon for most MP40s to have some degree of stock vertical play. Todd in Oregon So these stocks were flopping around on the german soldiers too ha Link to comment Share on other sites More sharing options...
huggytree Posted May 14, 2018 Author Report Share Posted May 14, 2018 i think the design is such that if they were tight on day 1 they were sloppy after a bit of field use... just a poor design Link to comment Share on other sites More sharing options...
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