UDL 1887 Toy to Airsoft Conversion

EDIT: Added nozzle file which was originally missing

A fully reversible conversion to turn the UDL shell ejecting Winchester 1887 foam dart blaster into a VSR magazine fed airsoft gun.

https://www.youtube.com/watch?v=Zaticd_St20

This conversion completely replaces the barrel assembly on the 1887, changing the finicky shells to a reliable and consistent nozzle based feed into a hop unit. With the upgraded spring, this will get you about 0.8J, or 300fps with a 0.2g bb. With the right barrel and bucking, you can get very impressive accuracy and range even at this mediocre power.

Optional parts in this kit are a front/rear sight and a sling mount.

Required hardware:
A 150mm gbb/vsr inner barrel (Can be longer or shorter, about 175mm max.)

A vsr/gbb bucking. I used a 60 degree maple leaf MR along with a maple leaf 6.01 barrel. If using maple leaf, use the included spring clip.

VSR magazines. I use Action Army 50rnd.

For the hop unit, 2 M3x8 cap head screws. Head dia ~5.3mm

For the TDC (Hop adjustment) 1 M3x8 grub screw

For the nozzle, 2 M5x5 grub screws

For the mag catch, 2 M3 grub screws, 6mm or longer, and one ~8mm diameter spring, 20mm or longer

For the forend to barrel connection, 1 m4x12 screw. Head dia 6mm or less.

For the mag tube, 1 M5x50 screw, head dia 8mm or less.

For the rear sight, 1 small M2.5 coarse thread screw, 5mm long with a low profile head. Cutoff lever or safety lever screws from inside a gearbox are about right, but you can find screws like this in cheap toys and such.

For the front sight, 1 M4x8mm screw and nut. Head dia 6mm or less.

You will need to remove the plastic part of the shell lifter for the conversion to cycle.

This can all be printed in PLA+ aside from the optional sling mount, which must be TPU. I printed everything at 0.2mm with a 0.8mm nozzle, but 0.4mm and 0.6mm nozzles should work.