Aero Precision Adjustable Gas Block Features The Aero Precision Adjustable Gas Block allows a shooter to dial in precise gas system tuning which is particularly useful for managing excess gas on a suppressed AR-15 or AR-308 build to reduce blowback into the shooter s face. A custom machined stainless steel adjustment screw provides 15 distinct gas settings each held in place by a spring and detent that produces an audible click removing the need for secondary set screws that can loosen under recoil. Carbon fouling generated during adjustment is channeled into a sacrificial chamber which helps prevent carbon locking and gives an access point for solvent if locking does occur. This serviceable design allows the shooter to clean and maintain the gas system without replacing the whole block. Machined from 4140 steel and finished with a nitride coating the block is built to handle sustained heat and pressure cycling without premature wear. Its low profile design fits under slim handguards including Aero Precision s own ATLAS series without adding bulk to the rifle s profile. Sized for a .936 inch gas block journal it attaches to the barrel using 10-32 by 3/16 inch knurled set screws and the kit includes a 6 inch adjustment wrench along with a replacement spring and detent. For AR-15 and AR-308 builders looking to fine tune their gas system for suppressed or competition use this adjustable gas block offers a straightforward serviceable solution. Aero Precision Adjustable Gas Block Specifications Manufacturer: Aero Precision Model: Adjustable Gas Block Compatible Hosts: AR-15 AR-308 Gas Block Diameter: 0.936 Color: Black Finish: Nitride Material: Steel Gas Block Style: Screws Weight: 0.088 lbs Available At: GrabAGun