JMac Customs Stock/Brace Adapter Black. The RSA-AK-NTR Stock/Brace adapter is very unique in the way it mounts to the rifle. The RSA-AK-NTR is compatible with most T3 pattern milled receivers and requires the removal of the bottom rear tang. The RSA-AK-NTR utilizes an upper and lower anchor which makes this device incredibly strong. 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 Milled AK using our FM-SM-1913 Folding Mech. NO PERMANENT MODIFICATIONS REQUIRED The upper tang remains on the receiver the lower tang is removed (not cut off) and our hardware is used in place of it. If you want to switch back all you have to do is re-install the lower tang. Materials and Finish RSA Adapter 7075 Aluminum Hardcoat Anodized Lower Mounting Block 4140 HT Steel Alloy Black Oxide Includes Mounting Hardware 2 Integrated QD Sling Mounts Weighs 4.6oz including mounting hardware Compatible with T3 pattern milled receiver with upper and lower tang. Requires the removal of the lower stock tang Specifications for JMac Customs RSA-AK-NTR Stock/Brace Adapter: Manufacturer: JMac Customs Color: Black Package Contents: JMac Customs RSA-AK-NTR Stock/Brace Adapter JMac Customs RSA-AK-NTR: RSA-AK-NTR Stock/Brace Adapter Black