AR-15/M16 ADJUSTABLE GAS BLOCK

Replaces the factory front sight/gas block and allows you to tune the gas system for smoother cycling and operation. Especially critical on match and varmint rifles when shooting both factory and custom-loaded ammunition. Simple setscrews let you control the gas flow, so you can customize the setting for each load. Hex head set screws clamp the block secuely to the barrel. Installation instructions included. Standard model features a topside Picatinny rail for mounting flip-up front sights and other accessories. Available in lightweight aluminum or stainless steel for additional muzzle weight. Fits barrels with .750" O.D. at gas block. Heavy - Aluminum, with rail, fits heavy barrels with .936" O.D. Low Profile model fits under handguard on .750" barrels. Rugged, all-steel construction resists gas erosion and helps maintain rifle’s weight distribution. A2-Style – Retains the classic sight tower look of military rifles and carbines. Two side-mount hex head screws clamp the block securely to barrels with .750" O.D. at the gas block position. Rugged, stainless steel construction resists gas erosion and helps maintain rifle’s weight distribution. Hard, abrasion-resistant black oxide finish.

SPECS: Standard - Aluminum, hard anodized, matte black, or stainless steel, natural finish. 1-7⁄8" (4.7cm) long, ¾" (19mm) wide. .750" (19mm) I.D. Heavy - Aluminum, hard anodized, matte black. 1-7⁄8" long, 1¼" (3.2cm) wide. .936" (23.7mm) I.D. Low Profile - Carbon steel, matte black. 1-7⁄8" long, 1" (2.5cm) wide. .750" I.D. A2-Style - 416 stainless steel, matte black oxide finish. 1-7⁄8" long, 7⁄8" (2.2cm) wide, 3-3⁄8" (8.6cm) high, .750” I.D.