Warning

 

Close
Confirm Action

Are you sure you wish to do this?

Cancel Confirm
AR15.COM
7/12/2026 2:19:06 AM EDT
I have a 29" M107A1 with roughly 400 rounds through it and I'm having some odd ejection issues. When i fire the rifle, the brass gets flung back and the case mouth hits the receiver down by the trigger pin/ safety selector area. The case mouth hits here everytime while its damaging the finish of the rifle thats not my main concern. The biggest issue is thats where my thumb rests..... my thumb gets destroyed by this and is quite unpleasant. Anyone have this issue or any suggestions? The rifle is unsuppressed, ejector is stiff but moves freely, extractor moves freely.
9/4/2026 8:49:38 AM EDT
[#1]
Mine ejects brass down there now and then as well. When I catch one with the knuckles that hits on the mouth (sharp) end of the case it’s unpleasant.

Sign up to continue the discussion

Create a free account to share your thoughts, follow topics, and connect with the AR15.COM community.

Already a member? Sign In