The K-SPEC bolt carrier group (BCG) is engineered to enhance the performance and reliability of AR-15-style firearms in both suppressed and unsuppressed modes, across various challenging conditions. It offers seamless integration, providing a plug-and-play experience without requiring additional tuning or adjustments to the gas or recoil systems. For suppressor users, the K-SPEC BCG eliminates the need for extra modifications, ensuring reliable operation straight out of the box. Crafted to the M16 full-auto profile, it withstands harsh environments like sand, mud, dirt and grime. Its innovative rail cuts efficiently disperse debris, maintaining peak functionality even with suppressor fouling and foreign contaminants. The "sand cutter" design features strategically placed angle cuts in the rails, channeling fouling and debris into noncritical areas away from the receiver, ensuring uninterrupted operation. The K-SPEC BCG relocates standard gas relief ports from the ejection-port side to the Magazine feed lip channels underneath, reducing debris and gas vented towards the shooter's face. Two emergency relief ports on the bottom of the carrier prevent structural damage in case of a case head separation. Testing confirms that venting gases through the Magazine well does not impact Magazine feeding or ammunition function, with minimal additional heat generated. The dual ejector system uses mil-spec ejectors and springs, requiring no proprietary components. Ejector holes are precisely centered on the lugs, preserving bolt strength. This system enhances ejection reliability and ensures a consistent ejection pattern. With over a decade of experience in manufacturing dual ejector bolts for the AR10/LR308 platform, KAK Industry has developed a robust and dependable dual ejector system for the AR-15 platform. Experience the superior reliability and adaptability of the K-SPEC BCG, designed to meet the demands of any mission and environment.

Engineered to operate dependably in the most challenging environments
Designed for optimal performance in both suppressed and unsuppressed configurations, suitable for all applications and conditions
Dual ejectors designed to improve reliability
Angled carrier rail cuts ensure optimal performance in challenging conditions and during extended suppressed operation
Downward-facing gas ports are designed to minimize gas Blowback towards the shooter
Automatic profile configuration
Permatex has been applied between the gas key and the carrier mating surface
Firing pin - constructed from 8740 steel, Swiss-turned, heat-treated, precision ground and chrome-plated
Cam pin - constructed from 4140 steel, precision Swiss-turned, heat-treated and finished with a phosphate coating
Extractor - constructed from 4140 steel, fully machined and coated with phosphate
Extractor Pin: manufactured from S7 tool steel, precision ground and heat-treated
Ejector - S7 tool steel, precision ground and heat-treated
The carrier is constructed from 8620 steel, with the outer rails, bolt paths and gas bores precision ground to tolerances of 0.0002 inches
It features a chrome-lined phosphate finish
Bolt - constructed from 9310 steel, with external diameters precision ground to tolerances of +/-0.0002 inches
Subjected to magnetic particle inspection (MPI) testing and finished with a phosphate coating
The gas key is constructed from 4130 steel and has undergone heat treatment
It is secured using T25 torx fasteners, torqued to the specified requirements and staked with a hydraulic staking machine
The finish is chrome-lined with a phosphate coating

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