Kalashnikov USA K21 Eastern Block MLOK Rail for AK KR103 KR9 series

The Kalashnikov USA Kusa Eastern Block K-21 M-LOK Rail delivers rugged reliability and slick handling for AK platforms, blending Eastern Bloc influence with modern implementational precision. Built to complement the AK 100 series and our KR-9 line, this rail is crafted from Magnite for exceptional durability and smooth operation in demanding field conditions. The K-21 rail showcases four M-LOK slots on each side of the lower handguard and a matching upper handguard featuring a recessed 5-slot 1913 rail, along with two 15-slot M-LOK proprietary rail sections for versatile accessory mounting. Installation is straightforward with four long screws and M-LOK nuts for the lower rail and four short screws for the upper handguard, all delivered in a sleek black finish. With a lower length of 6.29 inches and an upper length of 3.85 inches, the K-21 provides extended configuration options without compromising balance or control. This rail is compatible with our KR-103 7.62x39mm rifles and the KP-9/KR-9 series, offering a cohesive platform upgrade for enhanced stability, accessory compatibility, and superior handling across a range of shooting applications.