Grease Gunner Posted April 10, 2019 Report Share Posted April 10, 2019 Its so wierd, I have shot at least 10 thompsons, 1928s and m1a1s and only this one does that,Its like someone blowing air into your face, not a lot but enough to make me squint as I shootI am going to look at the buffer. Any board members have an answer? Its not obvious to meThanks Link to comment Share on other sites More sharing options...
BillyDixon Posted April 10, 2019 Report Share Posted April 10, 2019 are you shooting some kind of reloads?? what powder you useing?? Link to comment Share on other sites More sharing options...
john Posted April 10, 2019 Report Share Posted April 10, 2019 Both my '28s do that too....but I run them wet so get a mouthful of CLP fir the first couple mags after I oil them up.Just that all the parts are snug and well-machined....add oil and they're going to seal and act like a piston compressor. Link to comment Share on other sites More sharing options...
Grasshopper Posted April 10, 2019 Report Share Posted April 10, 2019 Hi, My M1's do that all the time. More than the top-cockers. The top-cockers have the groove in the sides of the receiver. I leave the felt at home. That allows the 21s or 28s to breath down the sides. The M1/M1A doesn't have the extra vent slots. When I oil them up I get quite a squirt of air out the back. Nature of the beasts in my experience. YMMV, Grasshopper Link to comment Share on other sites More sharing options...
jim c 351 Posted April 10, 2019 Report Share Posted April 10, 2019 I hope you are wearing good shooting glasses. Should eliminate the need to squint. Also the need to go blind.I notice it more with the 28. After shooting a few mags I have to clean the oil from my glasses.Jim C Link to comment Share on other sites More sharing options...
TSMGguy Posted April 10, 2019 Report Share Posted April 10, 2019 You're shooting left handed, huh? So do I. After my M1 has blown the last of the excess lube and CLP into my face, I hardly notice the blow-back. Shooting glasses a must. Link to comment Share on other sites More sharing options...
Grease Gunner Posted April 10, 2019 Author Report Share Posted April 10, 2019 (edited) Thanks for all the input.The top cockers dont do that for meYes, I am wearing shooting glassesshooting right handed And only factory ammo Edited April 10, 2019 by Grease Gunner Link to comment Share on other sites More sharing options...
Merry Ploughboy Posted April 10, 2019 Report Share Posted April 10, 2019 As the oil blow back is inherent to the Thompson, this may not be permissible for competition shooting in "original configuration" class shoots. On Model 1921 and 1928 sized pilots (I don't know if the M1/M1A1 pilot is the same diameter) a no. 36 o-ring stretched over the pilot protrusion out of the receiver and slid snug against the back of the receiver is pretty effective at turning much of the spray into a dribble. The dribble can occasionally be wiped off the receiver and frame. I did come up with a shield that adds even more protection from the oil, but I believe the o-ring alone is sufficiently effective for most shooting. Enjoy your Thompsons, and shoot safe. MHO, YMMV, etc. Link to comment Share on other sites More sharing options...
DZelenka Posted April 10, 2019 Report Share Posted April 10, 2019 As the oil blow back is inherent to the Thompson, this may not be permissible for competition shooting in "original configuration" class shoots. On Model 1921 and 1928 sized pilots (I don't know if the M1/M1A1 pilot is the same diameter) a no. 36 o-ring stretched over the pilot protrusion out of the receiver and slid snug against the back of the receiver is pretty effective at turning much of the spray into a dribble. The dribble can occasionally be wiped off the receiver and frame. I did come up with a shield that adds even more protection from the oil, but I believe the o-ring alone is sufficiently effective for most shooting. Enjoy your Thompsons, and shoot safe. MHO, YMMV, etc.Have you tried to put the O ring inside the receiver? Link to comment Share on other sites More sharing options...
Merry Ploughboy Posted April 10, 2019 Report Share Posted April 10, 2019 IIRC, I did look and it appeared that the o-ring would likely get chewed up if put inside because it would probably have to be placed between the buffer and the receiver wall to be effective. Perhaps I made too many or incorrect assumptions. One could try, though I don't plan on doing so. Link to comment Share on other sites More sharing options...
john Posted April 11, 2019 Report Share Posted April 11, 2019 An o-ring ...What a great idea - that is, if ya don't like the taste of Breakfree in the morning!I say that because most folks shooting Thompson's always wear the same grin! Link to comment Share on other sites More sharing options...
1921A Posted April 11, 2019 Report Share Posted April 11, 2019 I think you guys might be putting to much oil in your guns. We shoot 21s, 28s and M1s on a fairly regular basis and the only time I see this happen is when somebody gets a little over zealous with the oil. When I clean my guns I put a very small dab of lubricant on each face of the bolt and wipe it with my finger to spread a thin film where the bolt slides against the trigger frame and receiver. 21/21 actions also get a drop of oil on each pad after cleaning. My trigger frame components are usually left dry. You can use a cloth with a very small amount of oil to wipe lubricant on trigger frame components when you disassemble for cleaning. Excess oil here just creates gunk from powder residue and carbon. Link to comment Share on other sites More sharing options...
ppgcowboy Posted April 12, 2019 Report Share Posted April 12, 2019 They say shoot am wet. Link to comment Share on other sites More sharing options...
NFA amnesty Posted April 12, 2019 Report Share Posted April 12, 2019 (edited) Can you use gun grease on the bolt or do you guys recommend oil? I someday will receive my M1A1 when the ATF NFA Branch decides I am worthy enough to have my stamp. Of course at almost 10 months and not assigned to an examiner yet, could be in for a very long wait. Edited April 12, 2019 by NFA amnesty Link to comment Share on other sites More sharing options...
StrangeRanger Posted April 12, 2019 Report Share Posted April 12, 2019 On my M1 I grease the recoil spring and add oil, smear a little grease on the top, bottom and sides of the bolt and add oil, oil the hammer and firing pin. Lately I've been using CLP. Yes, I wear shooting glasses and yes, they get wet. Link to comment Share on other sites More sharing options...
NFA amnesty Posted April 13, 2019 Report Share Posted April 13, 2019 On my M1 I grease the recoil spring and add oil, smear a little grease on the top, bottom and sides of the bolt and add oil, oil the hammer and firing pin. Lately I've been using CLP. Yes, I wear shooting glasses and yes, they get wet.Thanks SR. Link to comment Share on other sites More sharing options...
reconbob Posted April 15, 2019 Report Share Posted April 15, 2019 For what its worth, do not use grease on/in the trigger frame. The disconnextor (the little leverthat fits in the trigger) spring is a very weak spring since all it is designed to do is flip the disconnectorout from under the sear lever. It is not strong enough to overcome grease. We recently had a gunin here that "didn't work" and the owner had loaded the trigger frame with thick white moly greasewhich completely clogged the disconnector. All we had to do was degrease it and it worked fine. Bob Link to comment Share on other sites More sharing options...
NFA amnesty Posted April 15, 2019 Report Share Posted April 15, 2019 For what its worth, do not use grease on/in the trigger frame. The disconnextor (the little leverthat fits in the trigger) spring is a very weak spring since all it is designed to do is flip the disconnectorout from under the sear lever. It is not strong enough to overcome grease. We recently had a gunin here that "didn't work" and the owner had loaded the trigger frame with thick white moly greasewhich completely clogged the disconnector. All we had to do was degrease it and it worked fine. BobGreat info on what not to do. Thanks Bob. Link to comment Share on other sites More sharing options...
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