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Picatinny Or Low Profile Options To Fit Your Application

Unique, all-steel gas blocks expand the versatility of your rifle by providing a variety of accessory rail and handguard mounting options. Especially helpful in customizing short-barrelled tactical rifles. Machined from bar stock for extra strength and rigidity, then mil-spec Parkerized for exceptional wear- and corrosion-resistance. One-piece, 4-Rail model features top/bottom and side rails that accept Weaver or Picatinny mounted, tactical accessories, including the Yankee Hill Gas Block Front Flip Sight. Secures to barrel with included setscrews. Low Profile version is a low and narrow, one-piece block designed to fit inside most free-float handguards; allows use of rifle length forearms on carbine length barrels for a clean, streamlined look and added gripping surface. Secures to barrel with included setscrews. Low Profile 2 is shorter and lighter than the Low Profile, and allows rifle length forearms to fit carbine-length barrels. Low Profile Slotted has a slot cut into the bottom for easy mounting and dismounting; slide the block into position and tighten the two pinch screws to snug it securely to the barrel. 2-Rail gas block is an easy-to-install, two-piece unit that clamps around the barrel using four hex screws; includes machined top and bottom Picatinny rails only. Single-Rail w/Lug & Swivel adds a top-side Picatinny rail for mounting accessories, and provides a bayonet lug and sling mount like an A2 gas block/front sight tower. Two-piece design clamps your rifle’s standard contour, .750" diameter barrel with four, capscrews—no need to remove muzzle brake or flash suppressor to install. Bayonet lug accepts a mil-spec bayonet or lug-mounted bipod, and pivoting, rubber-coated sling swivel accepts tactical slings up to 1¼" wide. Single Rail has four Picatinny slots on top. Clamps to your rifle’s standard contour, .750" O.D. barrel with two setscrews. Single-Rail A1 fits skinny .625" O.D. M16A1-style barrel and provides four Picatinny rail slots to let you install a clamp-on auxiliary “iron” sight or other accessory. Slides over barrel (flash hider must be removed to install) and clamps with two hex head screws. Specter model provides plenty of clearance to mount a free-float forearm that extends over the gas block, including Yankee Hill Specter handguards. Fits under any forearm with an inside diameter of 15⁄8" or greater. Easy to install two-piece design eliminates the need to remove a pinned or welded-on flash hider or muzzle brake. Clamps securely to barrel with four, hardened steel, hex-head cap screws.


AR-15, Issue:10, Page:014
Big Book Catalog, Issue:67, Page:015
Law Enforcement / Police Store, Issue:09, Page:054
New Product Supplement, Issue:602, Page:004

SPECS: Steel, mil-spec phosphate finish. Unless otherwise noted, fits .750" diameter barrels. 4-Rail - 1-7⁄8" (4.8cm) long, 1-1⁄4" (3.2cm) wide, 1-3⁄4" (4.4cm) high. 5.7 oz. (162 g) wt. 2-Rail - 1-3⁄4" long, 1-1⁄4" wide, 1-3⁄4" high. 5.4 oz. (153 g) wt. Single-Rail w/Lug & Swivel - 1-7⁄8" (4.8cm) long, 1-3⁄16" (3cm) wide, 1¾" (4.5cm) high. 5.5 oz. (155g) weight. Single Rail - 1-7⁄8” (4.8cm) long, 1” (2.5cm) wide, 1-5⁄8” (4.1cm) overall height, 9⁄16” (1.5cm) rail height. 4.4 oz. (124g) weight. Fits barrels with .750” O.D. at the gas port. Single-Rail A1 - 1-7⁄8" (4.8cm) long, 1" (2.5cm) wide, 1-5⁄8" (4.1cm) overall height, 9⁄16" (1.5cm) rail height. 5.1 oz. (145g) weight. Fits M16A1-style barrels with .625" O.D. at the gas port. Low Profile - 1-7⁄8" long, 1" (2.5cm) wide, 1-5⁄16" (3.3cm) high. 4.4 oz. (125 g) wt. Low Profile 2 - .950” (2.4cm) long, 1-1⁄3” (3.3cm) high. 1.4 oz. (40g) wt. Low Profile Slotted - .950” (2.4cm) long, 1-3⁄8” (3.7cm) high. 1.8 oz (51g) wt. Specter - 1-7⁄8" (4.7cm) long, 1½" (3.8cm) wide. 4.4 oz. (125 g) weight. Fits barrel with .750" O.D. at gas port.

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9 Item(s)
LOW PROFILE GAS BLOCK
100-002-075WB
Low Profile Gas Block
100002075Low Profile Gas Block

Mfr Part: YHM9381A

$59.99

In Stock

Inside Diameter: .750

Material: Steel

Style: Low-Profile

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4 RAIL GAS BLOCK
100-002-074WB
4-Rail Gas Block
1000020744-Rail Gas Block

Mfr Part: YHM9380

$74.20

In Stock

Inside Diameter: .750

Material: Steel

Style: Rail

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TWO PIECE GAS BLOCK
100-002-076WB
2-Rail Gas Block
1000020762-Rail Gas Block

Mfr Part: YHM9390A

$67.00

In Stock

Inside Diameter: .750

Material: Steel

Style: Rail

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YHM9836A RAILED GAS BLOCK W/BAYONET LU
100-003-172WB
Single-Rail Gas Block w/Lug & Swivel
100003172Single-Rail Gas Block w/Lug & Swivel

Mfr Part: YHM9836A

$71.30

In Stock

Inside Diameter: .750

Material: Steel

Style: Rail

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SINGLE RAIL GAS BLOCK .625 DIA. BARREL
100-005-965WB
Single-Rail Gas Block for A1 Barrel
100005965Single-Rail Gas Block for A1 Barrel

Mfr Part: YHM9386A

$59.70

In Stock

Inside Diameter: .625

Material: Steel

Style: Rail

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SPECTER GAS BLOCK FOR .750 DIA BARRELS
100-004-501WB
Specter Gas Block
100004501Specter Gas Block

Mfr Part: YHM9378

$38.80

In Stock

Inside Diameter: .750

Material: Steel

Style: Specter

.750 DIAMETER SINGLE RAIL GAS BLOCK
100-009-089WB
.750 Diameter Single Rail Gas Block
100009089.750 Diameter Single Rail Gas Block

Mfr Part: YHM9385A

$59.70

In Stock

Inside Diameter: .750

Material: Steel

Style: Picatinny, Rail

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YHM-9383 LP GAS BLOCK ASSY
100-010-655WB
Low Profile Gas Block Assy
100010655Low Profile Gas Block Assy

Mfr Part: YHM9383

$23.99

In Stock

Inside Diameter: .750

Material: Steel

Style: Low-Profile

YHM-9384 LP GAS BLOCK SLOTTED
100-010-657WB
Low Profile Gas Block Slotted
100010657Low Profile Gas Block Slotted

Mfr Part: YHM9384

$32.99

In Stock

Inside Diameter: .750

Material: Steel

Style: Clamp, Low-Profile

AR-15/M16 GAS BLOCK