JMac Customs ST-6 Receiver Extension with 1913 Folder, Black

(S)keletonized(T)ube(6)inches long and 6 positions with our own 1913 folding mech (Not Assembled) This M4 tube adapter replaces the standard buffer tube to ensure the stock folds as flat as possible! Fits most M4 style stocks/braces Lightweight and Rigid Integrated QD Sling Sockets 6" Length 6 positions 7075 T6 Aluminum Type III Hardcoat Anodized