well, it works with the same concept as Loosewire; SOE Operative's slide action gun. though this gun does not have a slide it has the "mag in handle" idea.
instead of shooting white rods like loosewire's mine shoots bullet type things, and they work a lot better, if you pull the ram back far enough it never jams.
i hope you like it! please rate!
the third and forth are of the 1.5 version.
Step 1: Barrel
Step 2: Handle
Step 3: Top part of barrel
Step 5: Put it all together
i almost forgot the mag pusher. just make that first.