AR-15/M16 ACCESSORY RAIL GAS BLOCKS Reviews & Ratings

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.

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Solid assembly

I have both the DS AR15 gas blocks in .750 I.D. versions. Both parts are very well made. Fit and finish are excellent. I gave extra edge to the 2-rail version for its two-piece clamp style assembly design versus the one-piece format of the 4-rail version tightened by three set screws. The three set screws will eventually loosen up if they are not secured by Loctite during prolonged firing. For heavy duty use, the 2-rail version is higly recommended.