FEATURES: Standard low-profile design provides great fit under slim profile free float handguards including the Aero Precision ATLAS series of handguards Adjustment screw is held in place by a spring and detent, providing repeatable audible "clicks" upon adjustment removing the need for secondary set screws that can come loose under recoil Custom machined stainless-steel adjustment screw provides 15 gas adjustment settings Carbon fouling is channeled to a sacrificial chamber to help prevent carbon locking, as well as provide an access point for solvent in the event carbon locking does occur User-serviceable design allows for service and cleaning of the gas system SPECIFICATIONS: Machined from 4140 steel Nitride coated Compatible with barrels utilizing a .875 gas block journal Attaches to barrel via 10-32 x 3/16 knurled set screws INCLUDES: Assembled Adjustable Gas Block One 6" 3/32 adjustment wrench for easy gas block adjustment underneath installed handguard Replacement spring and detent included