Faxon Firearms Adjustable Gas Block Features The Faxon Firearms Adjustable Gas Block uses a patented anti-fouling adjustment design that positions the screw so it never contacts gas port carbon preventing the seizing that plagues many adjustable blocks over time. Fourteen tactile settings let a shooter dial gas flow from fully open to fully closed fine-tuning cycling speed and felt recoil for a specific barrel suppressor and buffer system combination. The block is machined for a .625 gas journal and secures with three set screws for a tight repeatable mount on compatible barrels. Adjustments are made simply with a 3/32 Allen key or a flathead screwdriver so no special tools are needed at the range. Built from durable steel with a matte black nitride finish the gas block measures just 1 in overall length and keeps a low profile footprint that fits beneath most modern free-float handguards. At roughly 0.07 lbs it adds negligible weight to a build while still standing up to sustained high-round-count use. The low profile design requires no gas tube roll pin beyond what a builder already has on hand since one is not included. For AR-15 owners looking to fine-tune reliability across a range of ammunition and suppressor setups this gas block is a precise American-made upgrade for sale at GrabAGun. Faxon Firearms Adjustable Gas Block Specifications Manufacturer: Faxon Firearms Model: Adjustable Gas Block Compatible Hosts: AR-15 Color: Black Material: Steel Finish: Black Nitride Gas Journal Diameter: .625 Length: 1 Mounting: 3 Set Screws Adjustment: 14-Position Tactile Weight: 0.07 lbs Made In: USA Available At: GrabAGun