CORE ELITE OPERATIONS CEO .750 GAS BLOCK FOR AR-15 A gas block that fails to hold zero or leaks pressure doesn't just hurt accuracy — it takes your rifle out of the fight. The Core Elite Operations .750 Gas Block is precision honed to exact bore tolerances, ensuring a gas-tight fit against the barrel that maintains consistent cycling under sustained fire. Every unit is 100% dimensionally inspected before leaving the floor — no sampling, no assumptions. The black nitride finish penetrates the steel rather than coating it, delivering a hard, corrosion-resistant surface that won't chip, flake, or wear through at the contact points where finishes typically fail first. Low-profile design clears free-float handguards without fitment issues on mil-spec and most billet AR-15 uppers. SPECIFICATIONS: Bore Diameter: .750 Profile: Low Profile Material: Steel Finish: Black Nitride Made in the USA See all of our AR15s and AR15 parts here.