Noveske Clamp-On Switchblock 5.56mm 20 Inch Rifle Length Gas Tube Matte Black Nitride Finish

Machined from 17-4ph stainless with a durable matte black nitride finish. Unit is secured to the barrel by 2 allen head cap screws. Designed for installation by an experienced armorer or gunsmith. Supplied with gas tube, wrench and instructions. Cannot be installed with standard plastic handguards and does not fit under a railed or tubular handguard.