Turn heads at the range with your Krinkov rifle with the KNS Precision® Adjustable Gas Piston System for Bulgarian 5.45 Krinkov. Featuring corrosion-resistant stainless steel construction with a durable nitride finish, this piston system is designed for long-lasting use and durable, low-friction, easy-to-clean operation. This system is easily installed in about 10 minutes with no major gunsmithing or permanent modification required and gives the user a wide range of adjustments for suppressed and unsuppressed use. Counts as 922r Compliant Part. This adjustable gas piston system was engineered to be a replacement for the AK’s piston head that attaches to the bolt carrier, this gas piston system is designed to help tame your AK’s gas system for more enjoyable shooting.