The TacFire Clamp-On Low Profile Gas Block (part no. MAR001CO) replaces the factory A2 front sight base on a 5.56/.223 rifle with a low-profile setup built for a free-float handguard. CNC-machined from steel and finished in a parkerized coating for corrosion and erosion resistance, it clamps directly onto a .750" barrel diameter without the pinning required by some competing designs.

Key Specifications

• Machined from steel for a gas block that stands up to sustained high-round-count use.
• Finished with an erosion-resistant parkerized coating to handle heat and combustion byproducts at the gas port.
• Sized for a .750" barrel diameter, matching the most common mid-weight AR-15 barrel contour.
• Uses a clamp-on design, so no drilling or pinning is required for installation.
• Built for 5.56/.223 rifles, replacing the factory A2 front sight base for a free-float handguard build.
• Ships with a roll pin, screw set, and hex wrench for a complete installation kit.
• Finished in black to match standard AR barrel and handguard finishes.

Frequently Asked Questions

What barrel diameter does this fit? It clamps onto a .750-inch diameter barrel, the standard mid-weight AR-15 contour at the gas port.

Do I need to pin this gas block? No, it uses a clamp-on design that does not require drilling or pinning.

What comes in the box? The gas block ships with a roll pin, screw set, and hex wrench for installation.

Buy the TacFire Clamp-On Low Profile Gas Block

Order this gas block from our AR gas system parts and set up your free-float build with a durable, easy-install low-profile block. Order it from our Lubbock, Texas gun shop for fast, insured shipping.