Re: 1928 Thompson
The trigger on a 28 is easy to fix but you don't necessarily want a 4 pound trigger pull on any full auto gun, much less a Thompson with that huge heavy bolt that fires from an open position. As a point of interest the model 28 and the model 21 T gun uses what is called a Blish system which is two pieces of brass that fit together in such a way that as the gun fires these two pieces create a wedge that binds or drags inside the receiver causing a delayed blow back as opposed to gun just running off with itself. The only other gun that I am aware that uses a modified version of that system is the all hand made Cosmi shotgun. The later T guns of the Koren war did not use that system but rather a fixed firing pin monolithic to a heavier bolt. Additionally those later guns will not take the drum magazines. A T gun in the hands of someone who knows the gun is an awesome weapon, but as a battle gun they are the worst. The open bolt and temperature variances issues make them in my view a poor choice for a battle gun and the 45 Auto round will not shoot nearly as far as a 22 long rifle.