Lead & Steel LS-QGB-750 .750" Gas Block 4140 Steel Nitride

The Lead & Steel LS-QGB-750 is a precision AR-platform gas block CNC-machined from solid 4140 carbon steel and finished in a durable black nitride coating. Sized for a .750" outer-diameter barrel gas journal, the QGB (Quality Gas Block) is built to deliver consistent gas flow and reliable cycling in hard-use rifles.

The nitride finish resists corrosion and provides a low-friction surface that holds up to field conditions, while the 4140 carbon steel construction gives the block the thermal stability and dimensional accuracy demanded by duty-grade carbine builds. Weighing just 3 oz, the LS-QGB-750 installs cleanly on the barrel gas seat and serves as a rugged anchor point for the gas tube without adding meaningful weight to the front end.

Whether you are assembling a duty carbine or rebuilding an existing AR-pattern rifle, the Lead & Steel QGB offers the solid, no-frills construction builders look for in a new production gas block ready for any platform running a .750" OD gas seat.