These are files for a Speedloader mount for Modified Nerf blasters. The mounts are designed to friction fit CPVC 1/2" tubes that are available in the US. I designed them to be used with my modified Firestrike, and Hotshock blasters that use CPVC couplers and CPVC speed loader barrels. Each mount holds 4 speed loaders. I designed one to be epoxied to the side of the blaster and one to fit over the toprail on other nerf blasters. I would reccomend printing on the side with supports to get maximum strength on the friction fit. Enjoy, and if you want to make these for sale please contact me first.