Protean moose deuce mag reciever

The hardware is bacically the same as the standard protean. Take the pusher from 0x1c1eans fileset and other files like bottom rail from the original protean fileset. 

From my testing I've found that this setup doesn't work well with only one stage. The performance and accuracy were pretty bad, so I decided to include a double stage version. I've also included optional parts for top loading the mag. Also I would definitely recommend using a bcar or other stabilisation devices because without it the darts go all over the place.

Fixed some flaws of the original design (mag overtravel, pusher slipping off the darts, inability to screw in the mag release) and added several other parts.