The Lantac GB750-S (LA00243) is an ultra low-profile gas block engineered for .750 inch diameter gas pad barrels. It uses a two set-screw retention design to hold the block securely in place and ships complete with #10-32 x .125″ set screws and a gas tube roll pin. The block locates the gas port hole at the specified .295 inch position from the barrel shoulder for consistent gas system timing. Finished in black phosphate for corrosion resistance, it is intended for compact AR-15 gas-system builds where clearance and precise port placement matter.
Key Specifications
- Color is black.
- Finish is black phosphate.
- Designed to fit .750 inch diameter gas pad barrels.
- Constructed from 4140 gun barrel steel.
- Retention uses a two set-screw design.
- Places the gas port at .295 inches from the shoulder.
- Internal diameter is .750 inches.
- Overall length is 0.875 inches.
- Weight is 1.2 ounces.
- Includes #10-32 x .125″ set screws and a gas tube roll pin.
With its ultra-low profile, precise gas-port placement, and robust 4140 steel construction, the GB750-S is a practical choice for builders and technicians seeking a compact, reliable gas block for .750 gas-pad barrels. Its simple set-screw retention and OE-style dimensions make it well suited to tight-clearance AR-15 configurations where dependable gas system performance is required.
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