Constructed from mil-spec 304 stainless with black nitride finish, this mid-length gas tube includes a stainless-steel roll pin. This is the same gas tube that is installed on all Spike's ST-15 rifles.

Ultra-high quality gas block, milled from a billet of 4140 steel, finished with a tough Melonited QPQ finish to increase durability and corrosion resistance; milled CHAMBERED logo on front of block face. Made for barrels with a .750 gas journal, featuring dual set-screws spaced .400 apart to keep it locked in place. Set screws and gas-block roll pin (for attaching gas tube) are included.

• BCM Low Profile Gas Block for AR15, M16, M4, M4A1.
• Machined of steel, phosphate finish, for .750 barrels.
• Manufactured within very tight Mil-Spec tolerances on all ID's.
• Barrel ID honed after finish per USGI TDP.
• Made by Bravo Company MFG, Inc. with set screw mounting.
• Set Screws are Steel 10-32 x 3/16 Knurled Cup Point