Brownells Brownells Brownells 75th Anniversary - A Shooting Heritage
Menu

Secure Forward Accessory Mounting With Minimal Weight & Bulk; 2- & 4-Rail Models

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. 4-Rail – Innovative, slim-line design adds side rails, yet is only .05" wider than the 2-Rail model and actually weighs less. Solid, one-piece construction with cutouts to eliminate unnecessary metal. 4-Rail model slides over barrel and anchor in place with three recessed hex-head screws for a tight friction fit. Installation requires removal and re-installation of muzzle attachment.


AR-15, Issue:11, Page:015
Big Book Catalog, Issue:68, Page:015

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, 1¾" (4.5cm) high. 2.6 oz. (74g) weight. 4-Rail – Satin black PTFE-impregnated finish. 17⁄8" long, 1¼" (3.2cm) wide, 1¾" high. 2.2 oz. (63g) weight.

narrow your choices »
Show Filters
2 Item(s)
AR15 2 RAIL H-BAR GAS BLOCK
100-004-516WB
2-Rail Standard Gas Block
1000045162-Rail Standard Gas Block

Mfr Part: DSC751

$69.99

Backorder, See Associate
Out of Stock

Inside Diameter: .750

Material: Aluminum

Style: Rail

AR15 4 RAIL GAS BLOCK
100-004-517WB
4-Rail Standard Gas Block
1000045174-Rail Standard Gas Block

Mfr Part: DSC755

$69.99

Online Only
In Stock

Inside Diameter: .750

Material: Aluminum

Style: Rail

AR-15/M16 ACCESSORY RAIL GAS BLOCKS