JMac Customs Stock/Brace Adapter Black. The RSA-AK Stock/Brace adapter is very unique in the way it mounts to the rifle. The RSA-AK is compatible with most T3 pattern milled receivers and requires the removal of the top and bottom rear tang. The RSA-AK utilizes an upper and lower anchor which makes this device incredibly strong. Once installed the RSA-AK will give you the shortest possible profile MIL-STD-1913 surface. This adapter allows you to attach any of our stocks/braces to include the Arm-Bar Skeletonized Stock Triangle Stock or ST-6 to your AKM/74 Rifle Specifications for JMac Customs RSA-AK Stock/Brace Adapter: Manufacturer: JMac Customs Color: Black Gun Model: AKM Fabric/Material: 7075 Aluminum Package Contents: JMac Customs RSA-AK Stock/Brace Adapter What firearm models does the manufacturer say JMac Customs RSA-AK Stock/Brace Adapter is compatible with? The manufacturer says that JMac Customs RSA-AK Stock/Brace Adapter is compatible with AKMJMac Customs RSA-AK: RSA-AK Stock/Brace Adapter Black