87 INDUSTRIES
AR-15/M16
PINNED GAS BLOCK KIT Easy To Install Pinned Gas Block
COLT COMPETITION
COMPETITION GAS BLOCK
DOUBLE STAR AR-15/M16 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. Slides over barrel and anchors in place with three recessed hexhead screws for a tight friction fit. Installation requires removal and re-installation of muzzle attachment. a b 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, 13/4" (4.5cm) high. 2.6 oz. (74g) weight. 4-Rail – Satin black PTFEimpregnated finish. 17/8" long, 11/4" (3.2cm) wide, 13/4" high. 2.2 oz. (63g) weight. #100-004-516EN 2-Rail Std. Gas Block, 2Z60B00 ���������� $ 69.99 #100-004-517EN 4-Rail Std. Gas Block, 2Z60E00 ���������� 69.99
LOW PROFILE ADJUSTABLE GAS BLOCK
SUPER GAS BLOCK
Forged Steel Replacement With Integral Bayonet Lug
Low Profile Fits Easily Under Long Free-Float Tubes
This gas block provides a "double threat" for the competition shooter: control of the gas flow so you can find the sweet spot in fine-tuning your rifle's cycling. And a minimal profile that lets you put this gas block under just about any handguard. The stainless steel adjustment screw is coupled with brass locking screw that won’t damage the threads. Self-tapping setscrews ensure a secure fit to the barrel with a perfect seal. If your installation leaves the block visible, the black nitride finish looks good and it's durable. a b SPECS: Machined 1045 steel, hard nitride coated, matte black. 1" long x .960" wide. Fits barrels with .750" O.D. at gas port. Includes instructions and two Allen wrenches. #100-015-286EN Adjustable Gas Block, 2Z53I57 ������������ $ 59.99
Model
DOUBLE STAR AR-15/M16
PICATINNY RAIL GAS BLOCK Ensures Reliable Gas Flow; Models For Three Popular Barrel Diameters Compact gas block clamps securely to barrel with a unique three-point attachment system to provide a solid accessory mounting platform and ensure proper gas system alignment for reliable cycling. Precision machined from highgrade 6061 T6 aluminum for an ideal combination of strength and low weight, with an integral MIL STD 1913 Picatinny rail on the topside. Anchors to the barrel with a pair of hex-head setscrews on the underside, plus a third screw on top to ensure a superior gas seal and resist unwanted movement that can impair gas system function. Streamlined design has clean, good-looking, angular lines with all exposed edges radiused to eliminate sharpness. Mil-spec hardcoat anodized for superior surface strength and wear resistance with an even, matte black finish that matchesmost manganese phosphate Parkerized barrel finishes. Models available to fit three common barrel outside diameters: hard-to-find .625" for A1 barrels, .750" for H-Bar and similar-style barrels, and .937" for bull barrels. a b SPECS: 6061 T6 aluminum, hardcoat anodized, matte black. All models 1.875" (cm) long. Rail heights are measured from top of barrel to top of rail. .625" - 1" (2.5cm) wide, 1.5" (3.8cm) overall height, .600" (1.5cm) rail height. 3 oz. (84g) weight. .750" - 1" wide, 1.5" overall height, .545" (13.8cm) rail height. 2.6 oz. (73g) weight. .937" –1.25" (3.2cm) wide, 1.625" (4.1cm) overall height, .445" (11.3cm) rail height. 2.5 oz. (71g) weight. #100-004-537EN .625" Picatinny Gas Block, 2Z25K71 ����� $ 29.99 #100-004-536EN .750" Picatinny Gas Block, 2Z26I89 ����� 31.99 #100-004-535EN .937" Picatinny Gas Block, 2Z25C71 ����� 29.99 100-009-514EN Adjustable Picatinny Gas Block, 2Z55I72 ������������������������������������������������������� 64.99 ADJUSTABLE GAS BLOCK - Adjustable version of Double Star's Picatinny gas block lets you reduce the recoil of your rifle by fine tuning the bolt velocity to match specific loads. Self-tapping set screws on the bottom ensure a secure barrel fit while the extra top set screw ensures a perfect gas seal. Stainless steel adjustment screw is held in place with a brass locking screw to prevent damage to the threads. SPECS: 6061 T6 aluminum, hard coat anodized, matte black. .750" (1.9cm) inside diameter. 100-009-514EN Adjustable Picatinny Gas Block, 2Z55I72 ����������������������������������������������������� $ 64.99
Orders/Tech: 800-741-0015
High-quality replacement for factory front sight housing includes bayonet lug, so you can upgrade a rifle manufactured during the nowexpired Assault Weapons Ban to authentic military appearance. Forged from C1137 steel, then heat-treated for superior strength before final machining to military specifications. Ready to accept an A1- or A2-type front sight post, spring, and detent of your choice. Hole for sling swivel rivet is predrilled. Holes must be drilled for setscrews or taper pins for precise fit to your gun. Matte black Parkerized finish matches standard mil-spec finish. HBAR fits both M16A2 and M4 contour heavy barrels currently used by the U.S. Military. A1 fits lightweight M16A1 contour barrel only. a b SPECS: Forged C1137 steel, matte black Parkerized finish. Height from top of barrel to top of sight housing without blade installed - 1.9" (4.8cm). HBAR – Fits .750" (19.1mm) OD M16A2 and M4 contour barrels. A1 – Fits .625" (15.9mm) OD M16A1 contour barrels only. #100-002-413EN HBAR-Type AR-15 Front Sight Housing, 2Z27F86 ���������������������������������� $ 34.99 #100-002-414EN A1-Type AR-15 Front Sight Housing, 2Z27D86 ���������������������������������������������������� 34.99
DOUBLE STAR AR-15/M16
RACE GUN GAS BLOCK Minimal Weight & Bulk For HardRunning Competition Rifles Low profile gas block made from long wearing steel sheds all un-necessary weight and bulk; helps keep your race gun’s muzzle light, fast and extremely pointable. Low profile will not interfere with optics or full length handguard tubes. Secures to the barrel with dual socket head set screws and accepts all Mil-spec gas tubes and roll pins. Drilling points are indexed on the side of the block to allow retention with factory issue taper pins, block requires drilling and reaming. Covers the taper pin holes if the block is replacing a standard front sight base. Steel construction ensures that the block will hand up to the high heat encountered at the gas port. Includes two starter holes for pinning. Two starter holes for pinning the gas block to the barrel gives the user a more permanent mounting option. a b SPECS: Machined 1045 steel, Parkerized, matte black finish. 1.9" (4.8cm long) 90" (22mm) wide, 1.42" (3.6cm) high. Fits barrels with .750" O.D. at gas port. #100-009-882EN Race Gun Gas Block, 2Z47K86 ������������ $ 52.99
DPMS AR15/M16/AR-STYLE .308
MICRO 936 GAS BLOCK Rugged, Low-Profile Steel Block Fits DPMS .308 SASS & Other .936" Diameter Barrels Ultra-low profile steel gas block is designed to fit under extended-length free-float tubes on the DPMS .308 SemiAuto Sniper System (SASS) barrel, and other AR-style .308 and AR-15/M16 barrels with a .936" O.D. at the gas block location. Two set screws on the underside keep the block firmly in place. Made of tough, 4140 steel for extra resistance to gas erosion. a b SPECS: 4140 steel, matte black phosphate finish. Fits barrels with .936" O.D. at gas block. #231-000-333EN Micro 936 Gas Block, 1C18L00 ��������� $ 19.99
order on the web
brownells.com
Minimal-bulk gas block fits easily under most free-float rails. All-steel construction provides plenty of strength to resist erosion from hot gas. Precisely machined for a close slip fit on standard .750" OD barrels. Includes mounting hardware and instructions. Gunsmith installation recommended. a b SPECS: Stainless steel, with natural finish (SS) or Black Nitride finish (SS Blk). Also available in carbon steel (CS), with matte black finish. 1" (2.5cm) long, 1.4" (3.6cm) high. Fits barrels .750" O.D. at gas port. #100-011-672EN Super Gas Block, SS, 7B59G00 ������������ $ 59.00 #100-014-198EN Super Gas Block, SS BLK, 7B68N51 ������ 69.00 #100-014-199EN Super Gas Block, CS, 7B38N72 ������������ 39.00
MIDWEST INDUSTRIES AR-15/M16
STEEL GAS BLOCKS One-Piece Design & Tough Steel Construction One-piece, low profile, steel gas block fits under most free-float handguards for a clean, uncluttered look. Models available to fit .625", .750" and .936" O.D. barrels. Locks securely to barrel with three steel setscrews. a b SPECS: 4140 billet steel, manganese Parkerized finish, matte black. .625" – 113/16" (4.6cm) long, 13/8" (3.4cm) high. 2.5 oz. (71g) wt. .750" – 13/4" (4.4cm) long, 13/8" high. 3.6 oz. (102g) wt. .936" – 113/16" long, 11/2" (3.8cm) high. 3.6 oz. wt. #100-008-248EN .625" Low Profile Gas Block, 2A38Q57 ��� $ 39.99 #100-002-854EN .750" Low Profile Gas Block, 2A38Q57 ��� 42.99 #100-004-908EN .936" Low Profile Gas Block, 2A38P57 �� � 39.99 PICATINNY RAIL GAS BLOCK - Steel gas block with integral Picatinny rail has extra height that lets you mount a flip up or co-witness front sight on the same plane as the receiver rail of your flattop AR-15/M16. Add a Picatinny rail handguard to have a continuous rail extending from the receiver to the gas block for superb accessory mounting flexibility. Precision machined from tough 4140 billet steel to stand up to tens of thousands of rounds without eroding. Fits .750" O.D. barrels, and locks securely to barrel with three setscrews. SPECS: 4140 steel, dark gray Parkerized finish. 113/16" (4.6cm) long, 113/16" high. Fits .750" O.D. barrels. 6.2 oz. (175g) weight. #100-003-073EN Steel Picatinny Rail Gas Block, 2A59J29 ���������������������������������������������������� $ 64.99
SEEKINS PRECISION AR-15/M16
ADJUSTABLE GAS BLOCK Lets You Adjust Gas Output For Reliable Extraction/Ejection Steel gas block lets you adjust the amount of gas flow, so you can tune gas output for reliable extraction and ejection with different ammo types. Brass friction screw holds adjustments without thread locker and won’t mar the adjustment screw. Fits under free-float handguards on .750" O.D. barrels. Dual bottom screws secure block to barrel. Requires Allen wrench, not included. a b SPECS: Steel, matte black finish. 1" (2.5cm) long. .9" (2.3cm) wide. 13/8" (3.5cm) high. 1.8 oz. (51g) wt. #100-011-244EN Adjustable Gas Block, 8C53E10 ����������� $ 57.99
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GAS BLOCKS & TUBES
ACCESSORY RAIL GAS BLOCKS
GEISSELE AR-15/M16
Ideal For Competition Shooters
Enables Fast User-Adjustment Of Gas Flow Without Tools Designed with the competitor in mind, this finger-adjustable gas block allows you to quickly and easily fine tune the gas flow on your rifle to suit specific ammunition. Its low profile means it will fit under extended hanguards, and three hardened clamp screws secure it to the barrel. Stainless steel adjustment knob is slightly offset to allow for clearance with a variety of handguards and barrels. a b SPECS: Heat-treated carbon steel, phosphate coat finish, matte black. 2" long x .85" wide x 1.4" high. Fits barrels with .750" O.D. at the gas port. #100-015-785EN Adj. Competition Gas Block, 2Z138J00 ������������������������������������������������ $ 149.99
DOUBLE STAR AR-15
FRONT SIGHT HOUSING
AR-15/m16
Made from 17-4 stainless steel, this pinned gas block is designed to be installed using simple tools. To install, simply tighten the vibration resistant set screw, then drill through the dimpled 1/8" pilot feature, and drive in the splined cross pin. Gas block fits standard .750" diameter barrels and its low profile works with a variety of free float handguards. a b SPECS: 17-4 stainless steel, black oxide finish. 1.5 oz. (42.5g) wt. .750" (1.9cm) inside dia. Kit includes: set screw, Loctite 262, 1/8" (3.2mm) drill bit, cross pin, gas tube roll pin, and Allen wrench. #100-014-170EN Pinned Gas Block Kit, 3D56K13 �������������$ 61.99
DOUBLE STAR AR-15/M16
