I have the 11.5 middy with an SLR adj. gas block, a Griffin Armament hammer comp and a Gemtech HALO-Ti that runs fine both suppressed and unsuppressed. The bolt speed is noticeably slower without the can and recoil is extremely mild. I’d have to go check but I think it has an H1 buffer. I would definitely get an adjustable block for it. But you will notice your rifle is significantly softer shooting with this barrel.