Battle Star Galactica Colonial Blaster

I really liked the blaster created by Grimm industries so I decided to model up my own with a little more details, more scale flash end and removable panels for putting in electronics.
This model is designed to use the following parts:

Magnets from amazon:
FINDMAG Premium Pack 50 Brushed Nickel Pawn Style Magnetic Push Pins,Perfect to use as Fridge Magnets, Office Magnets, Dry Erase Board Magnetic pins, Whiteboard, Map Pins
by FINDMAG
Link: http://a.co/d/9P0RpNb

Trigger witch from am