Just an adapter between Milspec buffer tubes and the Tokyo Marui Electric MP7 A1. I found the stock of the mp7 to be a bit uncomfy in longer games where you ADS a lot, as the stock doesn't provide head support unless it sits way too far up in the shoulder, which then again makes it hard to keep it planted.

The stock travel is about 65 mm from first to last hole and is distanced progressively.
It's meant to be used on the MP7 stock collapsed so that it doesn't start to wobble or detach from the mount plate, which only comes with 1 attachment screw hole.
Most of the rigidity comes from where it sits on the back of the gun.

If you wanna remix this and need the Fusion 360 file you can dm me and I'll answer within 1 week normally.

Creality

LD-002R

No

Yes

0.03 mm

100%

Resin Product Brochure: https://polyalkemi.no/wp-content/uploads/2021/09/TDS-Super-Strong-Resin.pdf

Printed with 20% support density, lifted model 5 mm off the bed for better stability and reduced chance of delamination.
This resin slightly bends and goes through plastic deformation instead of cracking when you apply heavy pressure on it, making it suitable for this project.

Printed on the Creality LD-002R with 9 sec normal layers exposure time and 60 sec first 15 layers.
Antialiasing on with 4 in grey level, no image blur.
Retract rate (rapids: 500, normal: 100) mm/min, bottom lift distance 10 mm and retract height 5 mm.

I always UV post-cure my prints after rinsing them, so these settings are not straight out of the box ready to go - but gives the most stable result.

Printed on the Elegoo Neptune 3 Pro with 75% infill at 0.1 mm layer height.
Using adaptive cubic infill in SuperSlicer.
Printed at 220°C Nozzle and 65°C Bed temps it took roughly 5 hrs.

Definately recommend supports. Try get the text to face up and select "snug" in support generation. Add a support blocker around the hole, as removing support material was kinda hard inside that.
Using PolySmart PLA - Tang Orange but you can use anything as long as it doesn't warp too much.
(I added ironing on the top of mine, which might distort the text a little)