If you are going to build a 9mm AR Pistol, why not go with parts from the 9mm specialists at Angstadt Arms? Their 9mm Flash Hider is made from 4041 hardened steel with a black nitride finish. More importantly, it is an extremely effective flash hider. Note: No crush washer included. Does not require the use of a crush washer, although one can be used if specific timing is desired.
Manufacturer Part Number: AA09FLASHS