This all-new Lightweight Bolt Carrier Group features the innovative SP4 coating—a hybrid DLC-style coating that improves wear resistance, reduces friction, and makes cleaning a breeze. SP4 is micro-porous, meaning carbon and other gunk doesn't stick like glue. That means you could throw it in the dishwasher (assuming you can convince your wife that it's a good idea) and it'll come out spick-and-span. SP4 has been tested to -44°F in Alaska and in the desert heat of the Middle East with NO lubrication—and performed flawlessly.
This model has been lightened with relief cuts to remove excess weight—so it's much lighter than most options out there. Includes a hand polished bolt carrier with a chrome lined bore and staked gas key, bolt with gas rings, firing pin, cam pin, and firing pin retaining pin.