Standard AR stock to fit a standard AR buffer tube. It may fit a bit loose depending on your tube, so some thin tape on the tube can help with fitment

This is designed to be used by the buffer tube found on The Goblin: https://www.thingiverse.com/thing:3676745

All parts print in place without supports required. The Retainer pin holders is hollow for an M3x25mm bolt and nut with some washers so it doesn't slide out.

You will need a 4-6mm X 8mm spring

I also have a design for a swing-open AEG version in the works.