Composite Max inventory gives an adjustable comb to dial-in eye-to-scope alignment and contains spacers for length of pull adjustment The GAU-18/A is a lightweight variant with the M2/M3 and is applied on the USAF's MH-fifty three Pave Very low and HH-sixty Pave Hawk helicopters. These weapons use the M2HB barrel https://thefairlist.com/story6713430/rumored-buzz-on-browning-firearms