I have a SW AR15 that when bringing a round in from the magazine the bold when close all the way and therefore won't fire.
You can jam it forward and get it to close but during operation it won't close. When there is no round the bolt closes completely. Only fails to close with a round in it. I have put probably 2000 rounds through it but always take it apart and clean it well.
I use decent 'federal" ammo. Never use wolf or other steal rounds. The mags are all magpul and in decent shape.
I know the basics about how to strip it down and clean it and replace some basic worn out parts if needed but am not very educated in the advanced maintenance. So.. Keep it simple !
You can jam it forward and get it to close but during operation it won't close. When there is no round the bolt closes completely. Only fails to close with a round in it. I have put probably 2000 rounds through it but always take it apart and clean it well.
I use decent 'federal" ammo. Never use wolf or other steal rounds. The mags are all magpul and in decent shape.
I know the basics about how to strip it down and clean it and replace some basic worn out parts if needed but am not very educated in the advanced maintenance. So.. Keep it simple !