Description
This KAK Industry AR-15 5.56/300 Blackout bolt carrier group is the DBC (dead-blow carrier) K-SPEC model with downward gas vents, dual ejectors, and a chrome-lined phosphate finish. A floating weight in the carrier tail sets a DBC apart from the non-DBC down-vent K-SPEC (MO-425-0512-003). This weight provides a dead-blow effect intended to reduce bolt bounce.
As on the other down-vent K-SPEC carriers, the standard gas-relief ports are moved under the carrier into the magazine feed-lip channels, with two extra emergency relief ports. Angled rail cuts and dual mil-spec ejectors (holes centered on the lugs) are included. The carrier is M16 full-auto profile.
The 8620 carrier and 9310 bolt are ground to .0002 in. tolerances on the surfaces. Permatex is used on the gas-key mating surface. Component steels and finishes are listed below.
Key specs
- Brand: KAK Industry
- Type: DBC K-SPEC AR-15 BCG, down vent, dual ejector
- Caliber: 5.56 NATO / .300 Blackout
- Carrier feature: floating weight in the tail (dead-blow)
- Profile: M16 full auto
- Finish: chrome-lined phosphate
- Carrier: 8620 steel, ground to .0002 in. on rails, bolt runs, and gas bores
- Bolt: 9310, 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
- Weight: 14.5 oz
- Patent: US 12,474,132 B2
- Manufacturer part number: MO-425-0510-044
- Made in the USA
Made in the USA by KAK Industry.