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The best KP9 stock adapter in our lineup is the JMac SM-5.5. It is one 1.4 oz mount that replaces the factory rear at the 5.5mm folding interface and takes every JMac stock, where the 1913 route needs two parts. On the KP9 it fits with conditions, so confirm your rear uses the 5.5mm hinge pin before you order. What does the SM-5.5 change on a KP9? The SM-5.5 is machined from 7075-T6 aluminum with a Type 3 hardcoat and weighs 1.4 oz. It is a direct factory stock replacement with two height option …

We are expanding the RSA stock adapter line by offering the RSA-5.5!(R)ailed(S)tock(A)dapter(5.5)mm rear trunnionsThis version of the RSA stock adapter will be specifically made for the Russian 5.5mm pin folding stocks. 5.5mm trunnions can be found in the SGL (Saiga) rifles and on the new KUSA vityaz clone, not to mention, the trunnion itself is more readily available than the 4.5mm version.This stock adapter, like the rest of the RSA line, will allow you to install SIG style stocks an …