JMac Customs TS-9P Stock 4.5mm Folding Aks w/Rubber Butt Pad Black TS-9P+SM-4.5. 5mm pin folding stocks. 4.5mm trunnions can be found in the SLR 104/106/107 UR/CR/FR. This stock adapter like the rest of the SM line will allow you to install all of Arm...