Description
This KAK AR-15 5.56 NATO and .300 Blackout bolt carrier group is the K-SPEC Enhanced side-vent model with dual ejectors and angled carrier rail cuts, in a chrome-lined phosphate finish. The gas ports stay in the usual side-vent location; this is not the down-vent K-SPEC (MO-425-0512-003).
The angled rail cuts are meant to move fouling and debris into non-critical areas. Dual ejectors use mil-spec ejectors and springs with no proprietary parts, and the ejector holes are centered on the lugs. The carrier is an M16 full-auto profile.
The 8620 carrier and 9310 bolt are ground to .0002 in. tolerances. Weight is 11.5 oz. Permatex is used between the gas key and carrier. Component steels and finishes are listed below.
Key specs
- Brand: KAK Industry
- Type: K-SPEC Enhanced AR-15 BCG, side vent, dual ejector, sand cuts
- Caliber: 5.56 NATO / .300 Blackout
- Profile: M16 full auto
- Finish: chrome-lined phosphate
- Carrier: 8620 steel, rails/bolt runs/gas bores ground to .0002 in., chrome-lined phosphate
- Bolt: 9310 steel, outside diameters ground to .0002 in., MPI, phosphate
- Firing pin: 8740, Swiss turned, heat treated, precision ground, chrome plated
- Cam pin: 4140, Swiss turned, heat treated, phosphate
- Extractor: 4140, fully machined, phosphate
- Extractor pin and ejector: S7 tool steel, ground, heat treated
- Gas key: 4130, T25 Torx, hydraulically staked, chrome-lined phosphate, Permatex on the mating surface
- Weight: 11.5 oz
- Manufacturer part number: MO-425-0512-005
- Made in the USA
Made in the USA by KAK Industry.