Forward Controls Design Ar-15 .750 Gas Block Steel

The Forward Controls Design AR-15 .750 gas block is a precision-machined component built for shooters who demand reliability over trends. Machined from heat-treated 4140 steel and finished with manganese phosphate coating, this .750 gas journal block is engineered to seal tight and handle the demands of serious shooting. FCD's design philosophy centers on strength and dependability—every ounce of material earns its place, and nothing is added just for looks.

What sets this gas block apart are the thoughtful details that come from real-world use. The gas tube hole features a semi-blind design with a 3/32-inch punch access port, allowing you to clear carbon buildup without disassembly or special tools. The dual bosses on either side give gunsmiths a precise reference for pinning the block to the barrel, and it accepts both 5/32×5/8 and 1/8×5/8 coiled pins. The set screws are spaced 0.450 inches apart, matching the popular SLR Rifleworks .750 dimpling jig for easy alignment during installation.

Every Forward Controls Design gas block ships with a gas tube pin and two knurled set screws ready to go. The coiled pins are available at no extra cost. This is American-made engineering—designed and manufactured in the USA by folks who understand what AR builders actually need.

Key Features

• Heat-treated 4140 steel construction with manganese phosphate coating for durability and corrosion resistance
• Semi-blind gas tube hole with 3/32-inch punch access port for field maintenance without disassembly
• Dual pinning bosses for precise barrel alignment; accepts 5/32×5/8 or 1/8×5/8 coiled pins
• Set screw spacing compatible with SLR Rifleworks .750 dimpling jig
• Knurled set screws for positive grip and reliable adjustability
• Low-profile design prioritizing strength and reliability over weight reduction
• Includes gas tube pin and two knurled set screws; coiled pins available at no additional cost

Specifications

Frequently Asked Questions

What's included with this gas block?

Each Forward Controls Design .750 gas block comes with a gas tube pin and two knurled set screws. Coiled pins (5/32×5/8 or 1/8×5/8) are available as a no-cost option.

Can I pin this gas block to my barrel?

Yes. The block features dual bosses that serve as pinning reference points. You can use either 5/32×5/8 or 1/8×5/8 coiled pins to secure it to your barrel. Many gunsmiths prefer this method for maximum security.

How do I clean carbon buildup from the gas tube hole?

The semi-blind gas tube hole includes a 3/32-inch punch access port on the front of the block. You can use a 3/32-inch punch to dislodge stuck gas tubes without removing the block or taking the rifle apart.

Is this compatible with the SLR Rifleworks dimpling jig?

The set screw spacing on this block (.450 inches) is compatible with one of the set screw spacing options on the popular SLR Rifleworks .750 dimpling jig, making installation alignment straightforward.