1911 thumbfire

[RangeMasterTX]

Recently at our range we had an unexpected discharge, a new shooter decided to add some CHEAP aftermarket parts to his argentine/essex 1911 including both grip and thumb safety, mainspring, trigger, and hammer.  no problem right? He fired several magazines with no problem then after loading a magazine and engaging the thumb safety he fired a few other weapons then went back to the 1911  took aim and flipped off the thumb safety firing the pistol WITHOUT TOUCHING THE TRIGGER scared the hell out of him.  He called me over and I found that with the pistol locked the trigger still had  a little travel and once the trigger had been pulled disengaging the safety would drop the hammer.  not good.   so now he has a  "thumb fired" 45     Just a little warning  go ahead and build have fun  CHECK EVERYTHING 

[williamlayton]

You gotta know what you are doing even though you know what you are doing, therefore; I don't do it---I let a smith I know do it.
Blessings

[Mikey]

OK, I can't tell ya how many times I have read this post.  Something within the internal mechanisms is out of tolerance and needs to be replaced.  My advice is to obtain a Chip McCormick Hammer and Trigger group with a new and adjustable trigger, sear and sear whatever it's called and, hammer.  I would also suggest a new grip safety.  If it still trips when the safety is disengaged either take it to a gunsmith or get rid of it for a newer piece.  JMHO.  Mikey.

[Mikey]

I would say at least the hammer and sear.  If the darn thing drops the hammer all the way then something is too short and it sounds like the hammer and sear are not always locking up as they should.  Same Mikey.

[K.K]

Choose your gundmith wisely, as well. I brought my 1911 in for a trigger job years ago. It was light, and crisp. I shot it quite a bit unti lone day....I tripped the trigger and the gun bucked 8 times and locked open!  I tried it again, and yep, it was a full-auto!  Not saying it wasn't great fun, but it certainly needed to be fixed.  I tried another gunsmith and he fixed the problem.  Just another example of leaving some of the more intricate work to a qualified professional, one known for their work on the firearms that you bring in.