Print settings in image

0.15mm layer height (you can get away with 0.2mm)
15% infill
Will require supports
No rafts but a brim is recommended
Requires 4 pins to connect the barrel-receiver-pistol grip

Orientation

See image gallery for part orientation. You might want to great a larger footprint of support material just as a preventative measure from it coming loose from the print bed as some parts will have thin walls.

Assembly

1. Slide Outer 1 (the front section) from the front of the barrel. The front site on the outer should slide into the notch on the front.
2. Slide Outer 2 (the ribbed section) onto the barrel from behind. This will be a close fit and will require a bit of force to slide into place. The front section where it meets the front sight may tip up and will need a bit of force to “click” into place (recommend you glue before clicking).
3. Attach the 3 accent pieces and trigger (trigger goes in back corner first) to the receiver.
4. Attach the pistol grip to the receiver (mask and paint before attaching grip to receiver).
5. Attach the receiver/grip combo to the back of the barrel.
6. Place the rear sight on top. It should butt up against the top of the receiver.
7. Carefully open up the rear sight detailing piece and insert from below. This piece should also butt up against the receiver (you can have either with flaps up or down).
8. The front of the barrel has spots for accents. You can install the provided parts or use a Gundam gold marker to fill in those spots.