Forward Controls Design AR-15 Gas Block GBF 0.750

GBF (Gas Block Forward Controls) is a 0.750 gas journal gas block done FCD way: meticulously designed and machined, with thoughtful features throughout. Machined from heat treated 4140 bar stock, GBF is manganese phosphate coated, and holds rather tight tolerances to squeeze every bit of tight seal from the design. GBF's gas tube hole can be described as a semi-blind hole, with an access port just big enough to allow a 3/32 punch to go through. This feature minimizes the gas tube hole while providing a means to dislodge a stuck gas tube. It includes bosses on both sides for easy reference to pin the GBF to the barrel. Both 5/32x5/8 and 1/8x5/8 pins can be used. Set screws are 0.450 apart, compatible with popular dimple jigs. GBF focuses on strength and dependability. A gas tube pin and two knurled set screws are included. Proudly designed and made in the USA.