KAK Industry K-SPEC Enhanced Features The KAK Industry K-SPEC Enhanced bolt carrier group is machined from 8620 steel a material chosen for its toughness and ability to stand up to the heat and pressure of repeated firing cycles. A chrome lined bore and phosphate finish work together to resist corrosion and keep the internals lubricated which reduces wear over the life of the carrier. At 7.5 inches long and 9.5 ounces the carrier fits standard AR-15 style receivers without any modification. The full auto profile carrier gives the bolt carrier group extra mass which helps smooth out the cycling impulse compared to a semi auto only profile. Sand cutter carrier rails are machined into the carrier body to channel grit and fouling away from the critical bearing surfaces reducing the chance of a stoppage when the rifle gets dirty. Downward facing gas vents direct carbon and gas away from the shooter s face and out of the action which is especially useful on a suppressed rifle where backpressure increases significantly. Finished in black phosphate the K-SPEC Enhanced carrier is built to run in harsh high round count environments. This bolt carrier group is a straightforward reliability upgrade for any AR-15 owner running suppressed unsuppressed or in dusty field conditions. KAK Industry K-SPEC Enhanced Specifications Manufacturer: KAK Industry Model: K-SPEC Enhanced Type: Bolt Carrier Compatible Hosts: AR-15 Color: Black Material: 8620 Steel Finish: Chrome Lined / Phosphate Length: 7.50 Weight: 9.50 oz Available At: GrabAGun