Aurora Upper Receiver baseline

Aurora Systems baseline upper receiver. all critical dimensions are valid, and part is saved in print orientation. this upper receiver design can be used as a starting point for any customization that is desired. any movement/relocation or alteration of the mounting lugs will lead to fitment issues on matching lower receiver.

Use this as a starting point for custom receivers to fire whatever nerf darts you choose, from whatever configuration you decide on.

the Plunger tube is 32mm OD 27mm ID 100mm long seamless aluminum tubing and is a press fit from the rear of the receiver with no glue required.