JMac Customs 5.5mm Folding AK Stock Pin Black Nitride Black. 5 (not assembled)Lightweight and RigidModular Design - Brace/Stock with many mounting optionsIntegrated QD Sling Socket8'' Length7075 T6 AluminumHard-Coat AnodizedOptional Folding Buttplate The AB-BA adapter allows you to install braces like the TailHook from Gear Head WorksAnti-Rotational design7075 T6 AluminumType 3 Hard-coat AnodizeAB-BA Socket Head Screw AB-BA Anti-Rotation Pin SM adapters utilize the factory rear trunnions and eliminate the need for additional adapters or folding mechs.This version of the SM stock/brace adapter 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 KP-9 and KR-9 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 our 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.2 height positions7075 aluminumBlack hardcoat anodize finishIncludes mounting bolt for lower hole Specifications for JMac Customs 5.5mm Folding AK Stock Pin: Manufacturer: JMac Customs Color: Black Finish: Nitride Gun Make: Kalashnikov Fabric/Material: 4140 heat treated steel Length: 5.5 mm Features of JMac Customs 5.5mm Folding AK Stock Pin 2 QD Sling points Drilled and Tapped for Cheek Risers Package Contents: JMac Customs 5.5mm Folding AK Stock Pin JMac Customs FSP-5.5: 5.5mm Folding AK Stock Pin Black Nitride Black