Buffer Tube Adjustable Stock

Description:
Based on a 30mm buffer tube. This part is only meant for toys like airsoft and nerf blasters.

Testing was done using the buffer tube I created as well as a few airsoft and worker buffer tubes. If you need a picatinny buffer tube, here is the one I made. A NStrike version is coming soon.

https://makerworld.com/en/models/3222080-picatinny-buffer-tube
https://www.printables.com/model/1823958-picatinny-buffer-tube

Materials:
Spring - I used a 0.027x0.3x0.79* (0.7*7*20mm) 10 lap
4x M3x12mm screws for butt plate
4x M3x6mm screws for retention arms and pin holder

Parts:
Stock Body: Main body of the stock
Butt Plate: Grippy part that goes between the stock and your shoulder
Retention Pin: Goes in the slot on the Stock Body and connects with the buffer tube this is the part the makes the stock adjustable
Pin Holder: Holds the Retention Pin and spring in place
Adjustment Lever: Lowers the Retention Pin, allowing the stock to be adjusted
Retention Arm Washer: Goes between the screw and the Stock Body to hold in the Adjustment Lever - it helps prevent binding

Printer Settings:
PETG recommended - especially for flexibility on the pin holder and adjustment lever
30% gyroid infill

Stock: 4 walls (more for a more satisfying weight), supports are necessary. Too many walls can make it difficult to install the pin holder without breaking!
Butt Plate: : 2 walls, no supports - You can consider TPU here!
Retention Arm Washer: 2 walls, no supports
Retention Pin: 8 walls, print vertically - brims recommended.
Pin Holder: 8 walls, supports are necessary
Adjustment Lever: 8 walls, supports are necessary

Instructions:
1) Clean up the parts well, especially in moving areas like the slot in the stock for the retention pin. Some sanding may be helpful where the stock and butt plate meet to prevent a gap, but it is not required.
2) Use 4 M3x12 screws to attach the Butt Plate to the Stock Body. I typically start threading the screws into the Butt Plate and then clamp it to the Stock Body to make sure the screws don't push it away as I am tightening.
3) Slide the Retention Pin onto the slot on the Stock Body. The long end is down.
4) Put the spring behind the Retention Pin. Make sure the spring connects with the long end of the Retention Pin or it will not be able to compress.
5) Clip the Pin Holder to the Stock Body so that the hole on the end is aligned with the hole at the front of the Stock Body. Slide the Pin Holder perpendicularly to the Stock Body to reduce stress on the clips - take your time. Secure it to the Stock Body with 2 M3x6mm screws.
6) Gently slide the Adjustment Lever over the posts on the Stock Body taking care so they do not break. If you used the recommended printer settings, you should be fine.
7) Add a Retention Arm Washer on each of the posts on the Stock body, on top of the post. Secure each with a M3x6mm screw. The recess should be facing out for the screw head.