Grab the best AR-15 adjustable gas block on the market made by Superlative Arms and branded by Bear Creek Arsenal! This adjustable gas block allows you to control the gas going back into your bolt carrier group and thus fine-tune your AR-15 rifle for every situation. Adjustable gas blocks are invaluable for reducing felt recoil, lowering wear and tear on the bolt carrier group, and tuning a rifle for a suppressor. Superlative Arm's patented "Bleed Off" system allows excess gas to be let out of the front of the gas block instead of restricting the flow like traditional adjustable gas blocks. At Bear Creek Arsenal we look to give our customers the very best for their money, and this adjustable gas block is just that. Features: .750" Diameter 416 Stainless Steel Melonite Finish 30 locked positions Included: .750" Assembled Gas Block (2) 10-32 x 1/4" Set Screws (1) 5/64" x 5/16" Gas Tube Roll Pin (1) 3/32 x 6" L-Shaped Hex Key, Ball-end / Torx T-15 Tool Detailed instructions It is the responsibility of the consumer to ensure all state, local, federal, and ITAR regulations are followed