***!? No clue there,but now im curious!

 

I at a guess would say that its a machining fault

 

I would suggest you contact CMMG customer service. I would be curious what their explanation would be.

 

 

That was my first guess too. The gun is well made otherwise. But I’ll tell them.

 

Please do keep us posted.

 

CMMG said its a remnant from machining ✔

 

It's a sad fact that although a company may produce a quality product? At the end of the day there are always variables due to mass production that there will be small mishaps that escape quality control! I don't think that any thing can be blamed!

 

Yeah I thought no harm no foul. A good reminder though to detail a newly bought firearm, new or used. If left alone that shaving would probably break at some point and could be pushed into the firing pin channel or get caught in the bolt carrier. I think I’ll do a review of this braced “pistol”.

 

It's a wise decision! 99 times out of 100 There will be nothing amiss with a quality grade new fire arm but..... As for second hand firearms? You don't know the history! It pays to strip em down and go through every part