These are some parts from AprilStorm's design that I've modified a little to make assembly easier. Now that larger build spaces are more common and multiple print processes are easier to set up, I've combined a few of the parts. Removing joints to assemble/weld and adding pins to connect the barrel made everything stable. I printed everything in PLA and it came out solid. The trigger is slightly smaller to accommodate the extra plastic added to keep the handle area nice and rigid.
You might consider using something like Raptor PLA or PLA+ for the piece that connects the stock and the handle. I settled on printing that piece with enough top, bottom, and perimeter walls to completely fill the model and make it solid. It has a little flex when holding the blaster horizontally due to the weight of the parts, but there will probably always be some give since we are using plastic.
Printer:
Athorbot Brother
Rafts:
No
Supports:
Yes
Resolution:
.24
Infill:
30-100%
Notes:
The handle will need supports. I printed it at 100% infill to make sure it was sturdy. I used 60% infill around the areas with pins and 30% in the remaining areas.
I suggest making the piece between the stock and handle as rigid as possible. This is the thinnest and most flexible part. I increased the top, bottom, and perimeter layers until it was solid with no infill.
I created several print processes to change filament color for the parts with black and silver.
The handle will now take more plastic than April's original design because it will need supports. It will be very sturdy though. That point is easily breakable if epoxied together instead of printed as one piece. I found out the first time I broke it ;).
Put a little epoxy in the barrel pin holes, push the pins in, barrel pieces together, and done. If you attach the stock and handle with screws there is no more welding necessary.
