KAK Industry Bolt Carrier Group Features The KAK Industry bolt carrier group uses a full M16 auto profile carrier paired with a 9310 steel bolt a stronger alloy than the 8620 steel found in many standard bolts and one better suited to resisting fatigue under repeated cycling. The NP3 finish applied through an electroless nickel plating process combined with a fluoropolymer significantly reduces friction across the carrier and bolt surfaces. That lower friction translates directly into smoother cycling and reduced fouling buildup since the coating also resists carbon adhesion during extended firing sessions. An NP3-coated cam pin extends that same low-friction corrosion-resistant benefit to another key wear point in the action. A 4130 steel gas key completes the assembly providing a durable properly staked connection for reliable gas system function. Compatible with both 5.56 NATO and .300 AAC Blackout chamberings on the AR-15 platform this bolt carrier group gives shooters flexibility across caliber conversions without swapping components. The Titanium Gray finish gives the BCG a distinctive look that sets it apart from typical black nitride or phosphate finishes. For sale at GrabAGun this bolt carrier group is a durable low-maintenance upgrade for AR-15 builders seeking improved reliability. KAK Industry Bolt Carrier Group Specifications Manufacturer: KAK Industry Model: Bolt Carrier Group Caliber: 5.56 / .300 AAC Blackout Gun Platform: AR-15 Material: 9310 Steel Bolt Finish: NP3 Coated Type: Standard BCG Hand: Right Hand Color: Titanium Gray Available At: GrabAGun