So I bought a used gun and it didn't come with a stock, all it came with is a little cap that screws on to the back. How do I attach a stock on to the back? I have an Echo 1 MOD4 CQB AEG
Ares Elite Force M4 Cqb KWA CQR MOD 2 WE Tech 4.3 Hi Capa Spec Ops OE Tech MPS Plate Carrier