KNS Precision Adjustable Gas Piston System- 5.45 Krinkov Black AGP-A-1. The patent-pending KNS Precision Adjustable Gas Piston System is a replacement for the AKs piston head that attaches to the bolt carrier in about 10 minutes with no major...
KNS Precision Adjustable Gas Piston System- 5.45 Krinkov Black AGP-A-1. The patent-pending KNS Precision Adjustable Gas Piston System is a replacement for the AKs piston head that attaches to the bolt carrier in about 10 minutes with no major...