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  4. KAK Industries K-SPEC Enhanced AR-15 BCG, 5.56/.300 Blackout, Down Vent, Dual Ejector, Sand Cuts, Full Chrome Finish


 

KAK Industries K-SPEC Enhanced AR-15 BCG, 5.56/.300 Blackout, Down Vent, Dual Ejector, Sand Cuts, Full Chrome Finish

Part Number: BCG-556-30000
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On sale $294.99 $219.99
Retail Price:$294.99
Your Savings:$75.00(25%)
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Availability: In Stock

Details

The K-SPEC Enhanced AR-15 BCG from KAK Industries is engineered for optimal performance across 5.56 and .300 Blackout platforms. This bolt carrier group (BCG) features a dual ejector system and innovative down vent gas port design to minimize gas blowback in the shooter's face, making it ideal for both suppressed and unsuppressed applications. Constructed from durable 8620 steel with precise .0002" tolerances, the carrier includes sand cuts—slotted angled rails to mitigate debris intrusion.


The C158 steel bolt is shot-peened and MPI inspected ensuring reliability under stress. Additionally, the full chrome finish and NP3 coating enhance corrosion resistance and functionality. The assembly weighs 11.5 oz and is machined and assembled with rigorous automated CMM inspection. This includes all necessary components: carrier, bolt, firing pin, cam pin, extractor, ejector, and gas key, making it a complete solution for AR-15 enthusiasts.

Specifications

Product: K-SPEC Enhanced AR-15 BCG — 5.56 / .300 Blackout (Patent Pending)

Compatibility: AR-15 platform, 5.56x45 / .300 Blackout; M16 full-auto profile (plug-and-play)

Optimized use: Suppressed or unsuppressed — runs reliably with no gas/recoil tuning

Key features: Dual ejectors; dowvent gas ports to reduce gas blowback; slotted angled carrier rails (sand cuts) for debris mitigation; reduced peak dB when used with a silencer

Carrier: 8620 steel; rails/bolt runs/gas bores ground to .0002" tolerances; NP3 finish; chrome lined

Bolt: C158 steel; ground to .0002" tolerances; shot-peened; MPI inspected; NP3 finish

Firing pin: 8740 steel, chrome plated

Cam pin: 4140 steel, NP3 finish

Extractor / Ejector / Pins: Extractor 4140 (phosphate), ejector & extractor pin S7 tool steel (heat treated)

Gas key: 4130 steel, NP3 finish, T25 fasteners, torqued & hydraulically staked; Permatex between key & carrier

Weight: 11.5 oz (assembled BCG)

Manufacturing: Machined & assembled in-house (MO facility); automated CMM inspection

Includes: Complete assembled BCG (carrier, bolt, firing pin, cam pin, extractor, ejector, gas key)

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