JMac Customs SS-8R for 5.5mm Folding AKs w/ 1913 Folding Mech Black SS-8RP+RSA-5.5+FM-SM-1913. 5mm Folding AKs w/ 1913 Folding Mech then you've showed up at the right spot.. Formulated by using some of the very most sturdy and long lasting resources...