HDPS Skeleton Stock and hardware
Those are made out of hi quality aircraft grade aluminum, tubes are also aluminum, NOT plastic. Sturdy and made to outlast your firearm. Compatible with HDPS all steel hinges and all ACE brand accessories, you can use it in a large variety of firearms, HK, AK, Daewoo, AR15/M16, SIG 556, FAL, AR180 and others. Stocks size is 8.5″, which will give the same total length of the UMP folding stock set up.