Lightweight gas blocks with integral MIL-STD 1913 Picatinny rails expand your AR’s accessory mounting options without adding excess weight or bulk. Lets you mount a backup iron sight, weapon light, laser sight, folding bipod, vertical grip, and other tactical accessories. Standard models fit barrels with .750" O.D. at gas port. 2-Rail – Two-piece, clamp-on design with top and bottom rails doesn’t require removal of flash hider to install or remove. Clamps securely in place with four hex-head cap screws for a rock-solid installation that won’t shift under recoil. Circular cutouts in the sides reduce weight without compromising strength.

SPECS: Standard – 6061 T6 aluminum, hardcoat anodized. Fits barrels with .750" O.D. 2-Rail – Matte black finish. 17?8" (4.8cm) long, 1.2" (3cm) wide, 1ѕ" (4.5cm) high. 2.6 oz. (74g) weight.