JMac Customs Buffer Tube Adapter for 4.5mm Folding AKs Hard Coat Anodized Black. Our M4-AK Stock/Brace adapter is very unique in the way it mounts to the rifle Ours has 2 anchors with large bolts and is INCREDIBLY STRONG NO PERMANENT MODIFICATIONS required the upper tang remains on the receiver the lower tang is removed (not cut off) and our hardware used in place of it If you want to switch back all you have to do is re-install the lower tang. Why buy ours? Its incredibly strong machined from 7075 and hardcoat anodized offers an optimal cheek wield for irons and red dots has built in QD sling points Specifications for JMac Customs Buffer Tube Adapter for 4.5mm Folding AKs: Manufacturer: JMac Customs Condition: New Color: Black Gun Make: Kalashnikov Gun Type: Rifle Fabric/Material: 7075-T6 Aluminum Features of JMac Customs Buffer Tube Adapter for 4.5mm Folding AKs Buffer Tube Adapter for AK T3 Milled Receiver Package Contents: JMac Customs Buffer Tube Adapter for 4.5mm Folding AKs JMac Customs MOD-2-4.5: Buffer Tube Adapter for 4.5mm Folding AKs Hard Coat Anodized Black