S&T/Golden Eagle/Marushin - M1887 (6mm BB) - Improved Shell Set - Airsoft - Free Download

*Also fits Golden Eagle and Marushin M1887, only 6mm BB version.

Unlock the potential of your S&T M1887 by using 3D printed shells that shoot more BBs and cycle better than the OEM shells. The shells are available in different sizes, 1 BB up to 8 BBs. For the M1887, I gave the shells some cool names to distinguish them easier. Don't like it? Deal with it. 

I found a seal design, that will retain your BBs in the shell, while not reducing your energy.
Gloss TPU (95a) is needed for the seals. If you follow my Print Settings, the seals will provide consistent power, not distinguishable from OEM shells.

Print Settings:

Shell Body:

I recommend PETG or PLA.
Feel free to go crazy with the colors.
Models are already orientated for optimal printing.

Layer height: 0,2mm
Perimeters: 3
Massive Layers (bottom): 20
Infill: 15%
No supports needed.

Seals:

You need to use a TPU (95a) with a gloss finish, to ensure a good seals.

Layer height: 0,2mm
Seam position: Random
Avoid crossing parameters: Active
Print parts one after the other: Active (only when printing more than one top seal at a time)
Perimeters: 3
Infill: 15%
No supports needed.