JMac Customs TS-9P Stock 5.5mm Folding Aks w/Rubber Butt Pad Black. 5 is 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 SM line will allow you to install all of Arm Bar and Stocks as well as SIG style stocks. Cheek wield is adjustable by moving the stock/brace up or down on the adapter. Specifications for JMac Customs TS-9P Stock 5.5mm Folding Aks w/Rubber Butt Pad: Manufacturer: JMac Customs Gun Model: AKM Stock/Brace Material: 7075 T6 Aluminum Color: Black Finish: Hard-Coat Anodized Weight: 8.75 oz Length: 9 in Condition: New Features of JMac Customs TS-9P Stock 5.5mm Folding Aks w/Rubber Butt Pad 2x Integrated QD Sling socket. 0.275in Cheek Rise. Drilled and tapped for optional cheek risers. Compatible with JMAC SM MRKT and 1913 Folding Mechs. Package Contents: JMac Customs TS-9P Stock 5.5mm Folding Aks w/Rubber Butt Pad What firearm models does the manufacturer say JMac Customs TS-9P Stock 5.5mm Folding Aks w/Rubber Butt Pad is compatible with? The manufacturer suggests that JMac Customs TS-9P Stock 5.5mm Folding Aks w/Rubber Butt Pad is compatible with AKMJMac Customs TS-9P+SM-5.5: TS-9P Stock 5.5mm Folding Aks w/Rubber Butt Pad Black