LAZ-STR-1

This is my first nerf, so it's kinda simple, since I don't own a 3d printer I can't test it myself so any criticism is welcome and encouraged.
Required materials:
*3mm metal axle for the trigger*
*rubber bands, if they don fit well you can tie 2 or put more than one to increase the power*
*Assembling*:
line up the trigger hole with the one in the receiver, the insert the axle to lock them in place, after that tie the rubber band in the hook in the front of the receiver, it should look like a crossbow without the arms.