While most people won't shoot a QUALITY DI AR enough to see it, there are other issues with DI. Dumping hot (dirty) gas back on your bolt increases fatigue. This is why I always kept a spare bolt in my kit when a DI AR was my "go to gun". I've seen a lot of busted boots in my lifetime.

JYD #123 The great one formerly known as Architect.

I am now a fictional British television police officer (currently a Detective Sgt) at Thames Valley Station. My governor is Detective Inspector Fred Thursday and it’s 1969.