Buzz Bee Air Warriors Tyrant NFStrike Compatible Replacement Breech Tube

NFStrike Accustrike Mega Darts ("Accufakes") are slightly bigger than standard Nerf Mega Darts and Buzz Bee XL Distance Darts and my Tyrant's breech would chew up and deform them instead of chambering them smoothly. So instead of painstakingly sanding down the inside of the existing breech to make them fit better I designed this replacement part with a larger inner diameter. While this worked, there are enough downsides that I will probably just do the sanding at some point in the future.

First: The part's geometry means that there really isn't a good orientation to print it, regardless of orientation stress will be placed along a layer line at some point.

Second: The part's thin, which means there's not much material to resist those stresses.

Third: While it seems to hold up well enough to firing darts, a single dry fire is usually enough to crack the tube, which means you have to make sure to count your darts well.

Make sure to pad the head of your plunger. This part has no air restrictor, which means the plunger moves faster, so you need to give the tube all the help it can get. I also recommend you remove the blaster's locks so you can safely deprime the blaster if needed.

Printing should be done in the orientation it is in the files (i.e. parallel to the build plate). You'll need supports regardless of orientation, and this way the tube can actually experience some breaks and still function. Printing it perpendicularly to the build plate tended to produce breaks that completely severed the priming mechanism from the breech, locking any magazine in the blaster until it was disassembled.