I'm thinking of selling

[bergermeister]

BAD MOVE

In kinda late on this reply, but if you are having FTF's, you should remove the firing pin spring. I shot some hard military primer rounds when I first got mine and I barely got it to fire.

Well I knew that wasn't going to work, so I broke the bolt down to see what was going on. None of my other AR 10 style rifles had a firing pin spring, so I didn't think that it was necessary on this one either.

I removed it, put everything back together and so far it has been 100% on everything from handload's to steel case **** to hard military primers.

That spring is in the MP-10 for a purpose. Guards AGAINST out-of-battery detonation
[read 35% harder hammer fall: HIPERTOUCH® 24 3G - 3Gun AR15/10 Fire-Control Drop-In 24C and 243G]

 

[LASigmon]

Just finished putting in the Geissele. Wow. I can't wait to shoot it. I've never had a trigger this nice. The Windham ar15 might have to get one too

 

[LASigmon]

I finally got to try out the new trigger. I believe it did make a difference. I don't know what kind of ammo I used other than it had ballistic tips. A friend of mine gave it to me. This was at 100 yds. The first 3 shots that I covered up was a 1.5" group then I adjusted my scope because they were low. The next 3 shot group is the one touching the bullseye and is under an inch. The next 4 shots above that are a 1.5". The total of all 7 shots after the scope adjustment is a 2" group. Yeah, I'm keeping it

 

[copemech]

I finally got to try out the new trigger. I believe it did make a difference. I don't know what kind of ammo I used other than it had ballistic tips. A friend of mine gave it to me. This was at 100 yds. The first 3 shots that I covered up was a 1.5" group then I adjusted my scope because they were low. The next 3 shot group is the one touching the bullseye and is under an inch. The next 4 shots above that are a 1.5". The total of all 7 shots after the scope adjustment is a 2" group. Yeah, I'm keeping it

1.5 cold, whatever ammo, then a small group?

Yep! Keeper!