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 setscrew lets you control the gas flow, so you can customize the setting for each load. Hex head setscrews clamp the block securely 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. Heavy Low Profile aluminum block fits under handguard on barrels with .936" O.D. Eight Torx T15 screws securely clamp the block to the barrel. A2-Style – Retains the classic 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. JPGS-5B Low-Profile model has a slimmer profile to reduce weight and to fit under a wider variety of handguards.
SPECS:
Standard - Available in 6061 T6 aluminum, hardcoat anodized, matte black, or 416 stainless steel, natural silver or black oxide finish. 17⁄8" (4.7cm) long, .950" (2.4cm) wide. .750" (19mm) I.D. Heavy - Aluminum, hard anodized, matte black. 17⁄8" long, 1¼" (3.2cm) wide. .936" (23.7mm) I.D. Low Profile - Carbon steel, matte black. 17⁄8" long, 1" (2.5cm) wide. .750" I.D. Heavy Low Profile - Aluminum, hardcoat anodized, matte black. 17⁄8" (4.7cm) long, 17⁄16" (3.6cm) wide. .936" I.D. 2.6 oz. (74g) weight. Minimum 1.750" handguard I.D. recommended for proper clearance. A2-Style - 416 stainless steel, matte black oxide finish. 17⁄8" long, 7⁄8" (2.2cm) wide, 33⁄8" (8.6cm) high, .750” I.D.
Catalog page 14