Machined from 1045 steel, this adjustable gas block includes a stainless steel adjustment screw and brass locking screw that won't damage the threads. Self-tapping set screws ensure a secure barrel fit with a perfect seal. Gas block has a black nitride coating for durability and an inside diameter of .750". Includes instructions and two Allen wrenches. Mfg: Double Star SPECS: 1045 steel, hard nitride coat, black. .750" inside diameter. 1" OAL.
