MadDog Posted December 31, 2014 Report Share Posted December 31, 2014 I just picked up a used AO 1927A1 and will send in my paperwork to SBR it soon. I have a VZ61 Scorpion SBR that bump fires from the shoulder like crazy. Figured I might as well use the Tommy Gun the way it was designed. Just wanted to know if anyone has mastered bump firing one from the shoulder? Link to comment Share on other sites More sharing options...
Embalmer Posted December 31, 2014 Report Share Posted December 31, 2014 Seen videos of a guy do it with a m1 pistol. I've been able to get 3 rounds off max bumping. Link to comment Share on other sites More sharing options...
ghostsoldier Posted December 31, 2014 Report Share Posted December 31, 2014 I am in awe of the guys who can...I have seen some awesome videos of guys doing it, especially from the hip, but from the shoulder would be epic. Rob Link to comment Share on other sites More sharing options...
Merry Ploughboy Posted December 31, 2014 Report Share Posted December 31, 2014 As well as the high inertial forces of the Thompson due to its mass, the normal Thompson trigger pull is rather heavy. I'd think one would have to do a good deal of lightening to be able to perform reliable, sustained bump fire. Sort of like having to use a 2# or less trigger pull on a .22 LR bump fire stock firearm to get reliable, sustained bump fire. Link to comment Share on other sites More sharing options...
MadDog Posted December 31, 2014 Author Report Share Posted December 31, 2014 I can bump my little VZ61 Scorpion SBR on demand from the shoulder at about 500rpm, I would guess. I am determined to learn to do it with my 27A1. Just wondering if anyone has tips on the best way to do it. I will start with the technique I use with the VZ61. Link to comment Share on other sites More sharing options...
nobby Posted January 1, 2015 Report Share Posted January 1, 2015 I can bump fire my FAL & my AR15 using the thumb in the belt loop method However I agree with the others, the trigger pull on my Thompson is so heavy, and the recoil so light, I'm not sure it will bump fire Guess I'll have to try now :-| Link to comment Share on other sites More sharing options...
Embalmer Posted January 12, 2015 Report Share Posted January 12, 2015 HERE IS HOW TO BUMP FIRE A THOMPSON: http://youtu.be/22BXs_C3GdQ Link to comment Share on other sites More sharing options...
ghostsoldier Posted January 13, 2015 Report Share Posted January 13, 2015 I wished he would explain how he does that...it almost seems to be FA.Rob Link to comment Share on other sites More sharing options...
mnshooter Posted January 16, 2015 Report Share Posted January 16, 2015 Hopefully he and the camera looking down the muzzle were alone at the range. Link to comment Share on other sites More sharing options...
tray burge Posted January 27, 2015 Report Share Posted January 27, 2015 It's all in the "Pull" of the front stock and just resting the finger on the trigger, but, I agree the trigger is too heavy. I see a trigger job in the near future of mine. Need to find someone that sells the lighter springs? Link to comment Share on other sites More sharing options...
ghostsoldier Posted January 27, 2015 Report Share Posted January 27, 2015 Need to find someone that sells the lighter springs? I'd be interested in a set also, if such a thing exists. Rob Link to comment Share on other sites More sharing options...
anticus Posted January 27, 2015 Report Share Posted January 27, 2015 TommyGunner.com advertises them for $80 a set Link to comment Share on other sites More sharing options...
ghostsoldier Posted January 27, 2015 Report Share Posted January 27, 2015 TommyGunner.com advertises them for $80 a set Those are the EZ Pulls for the bolt...we're looking for lighter trigger springs. Rob Link to comment Share on other sites More sharing options...
Merry Ploughboy Posted January 28, 2015 Report Share Posted January 28, 2015 (edited) http://triggerwork.net/thompson.html Only posted as information. I have no personal experience, or interest. Edited January 28, 2015 by Merry Ploughboy Link to comment Share on other sites More sharing options...
tray burge Posted January 28, 2015 Report Share Posted January 28, 2015 Hey, thanks for the info. Link to comment Share on other sites More sharing options...
ghostsoldier Posted January 28, 2015 Report Share Posted January 28, 2015 ^^^This.^^^ Rob Link to comment Share on other sites More sharing options...
Paladin601 Posted January 28, 2015 Report Share Posted January 28, 2015 there goes the wallet, really reasonable though, thanks Link to comment Share on other sites More sharing options...
Raining Brass Posted February 1, 2015 Report Share Posted February 1, 2015 I'm jumping in to add my thanks too. Link to comment Share on other sites More sharing options...
2ndArmored Posted February 2, 2015 Report Share Posted February 2, 2015 Notice too that the buttstock's been removed, that'll drop some weight, making recoil more pronounced and thus easier to "do the bump". And the barrel seems short for a semi. It could be the 13" barrel that came on the "pistol" model of the Thompson, if that's what he's shooting (and would explain the absence of the buttstock). Either way, it reduces the weight further (compared to the 16" barrel). Link to comment Share on other sites More sharing options...
Merry Ploughboy Posted February 2, 2015 Report Share Posted February 2, 2015 (edited) Notice too that the buttstock's been removed, that'll drop some weight, making recoil more pronounced and thus easier to "do the bump". And the barrel seems short for a semi. It could be the 13" barrel that came on the "pistol" model of the Thompson, if that's what he's shooting (and would explain the absence of the buttstock). Either way, it reduces the weight further (compared to the 16" barrel). Yeah, good catch. No compensator and I could not make out a stock mounting lug. Very likely a pistol, which also means it has a 10.5" barrel (the old version had a 13" barrel and vertical foregrip) and the aluminum (lighter weight) frame.ETA: Auto Ord shows the pistol weight at 5# 14.5 oz v. 13# for the steel framed ( 9.5# for Al) 27A1.EETA: I'm not sure about whether the AO numbers are direct comparisons. I weighed my steel framed 27A1 using a "not legal for use in trade" fish scale and it was something over 10# w/o mag and around 12+# with a full 30 rnd stick mag. And FWIW, using a trigger scale, the trigger pull came in at 8#. Edited February 3, 2015 by Merry Ploughboy Link to comment Share on other sites More sharing options...
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