Riflespeed Gas Control .625in Assembly Block AR15/AR10

Riflespeed Gas Control .625in Assembly Block for AR-15 and AR-10 platforms. Gas Control System allows tuning gas flow with a knurled knob—no tools required. Each setting clicks into place for repeatable operation and a clearly numbered scale. The block is built from steel with a nitride finish and QPQ coating for durability. Gas Block Journal Size-Diameter: .625 in. Caliber compatibility includes 6.5mm Grendel, 7.62x51mm NATO, 5.56x45mm NATO, .300 AAC Blackout, 6.8mm Remington SPC, .308 Winchester, and .223 Remington. Compatible with AR-10 and AR-15 receivers. Package Contents: - Riflespeed Gas Control .625in Assembly Block Notes: - Gas Controls require the use of straight gas tubes. - Multiple lengths are available to fit under extended handguards. - Rotation stop feature to prevent unintentional disassembly.