Which gas block for suppressor

[montana]

You will see more soot in the FCG with an inefficient carrier like that.

I don’t use bolt carriers if they are loose like that, which is one of the more important call-outs in the TDP.

Most manufacturers don’t pay attention to this, and just crank parts out the door.

Yup! Another sign is a bent retaining pin (cotter key) for firing pin..