Swapped the FH for an AAC Brakeout so I could run this build suppressed with a SDN-6. Kind of a pain since it is a pin and weld job but worth it. The brake made an already soft shooting rifle even softer. Suppressor makes it a bit nose heavy but doable. Quiet but the crack still had me wearing plugs. SLR gas block setting is two clicks with the can on, one click would cock the trigger but not lock the bolt back. It ran 120 rounds without a problem, IMI, Federal, and Speer Lawman, all 55 grain.