Really nice build, lower is the G&g ARP-9 and Upper is that of a SAI GRY. The internal reaper engine is sublime and works perfectly, except for the safety, which doesn't work. Trades accepted, message me $400 for just the engine and lower receiver $500 with the rail $575 with the rail and regulator and line $600 with the rail and regulator, and line and tank Trades should be valued at $700