Videos tagged with K-Spec BCG

This video addresses common issues found in two KAK bolt carrier groups (BCGs), specifically focusing on damaged extractor pivot pins. The instructor demonstrates how rolled-over pins prevent proper extractor function and require replacement. Additionally, rough surface finishes in the carrier key tunnel bore are highlighted as potential causes of premature wear and cycling issues.

This video investigates whether the downward venting design of the K-Spec BCG increases fouling in the AR-15 lower receiver and magazines, particularly when used with a suppressor. The testing protocol involved comparing fouling levels after firing suppressed and unsuppressed with both the K-Spec BCG and a standard milspec BCG. The results suggest that while suppressors significantly increase fouling, the K-Spec's downward venting does not appear to contribute meaningfully to increased fouling in the magazine or fire control group compared to a standard BCG.

This video reviews the KAK 13.9" Pin/Weld Bravo Mount upper assembly, highlighting its direct Hub compatible muzzle device designed for easy suppressor attachment. The 13.9" barrel, combined with the pinned and welded muzzle device, achieves a 16" legal length. The upper features a 4150 CMV button-rifled barrel, a mid-length gas system optimized for suppressed use, and a robust rail system with M-LOK and a monolithic top picatinny rail. The reviewer emphasizes the value proposition, especially with the K-Spec BCG upgrade and a discount code.