The Firing Line Forums - View Single Post

RAnb · November 13, 2011, 11:18 AM

I would start with the BLK as it is made to cycle the AR action with sub or super sonic ammo. I have uppers for 223 and 300 whisper.

Ranb

November 13, 2011, 11:18 AM	#5
RAnb Junior member Join Date: July 20, 2008 Location: WA, USA Posts: 447	I would start with the BLK as it is made to cycle the AR action with sub or super sonic ammo. I have uppers for 223 and 300 whisper. Ranb