Custom Airsoft Picatinny Folding Adapter

Custom Picatinny Stock Folding Adapter

This is my new Picatinny folding adapter designed to turn fixed (non-folding) stocks into folding ones for airsoft replicas with a rear Picatinny rail.

It locks in place when unfolded, and with a simple press of a button, the stock folds and snaps into place to keep it from flopping around. (Note that it may unsnap if moved too hard, as it’s a simple snap-fit mechanism.)

This adapter is designed to sit between your replica’s rear Picatinny rail and your existing stock, adding a folding function without replacing your current setup.

Three hinge versions are included:

• Standard: For most rear Picatinny rail adapters.
• XS: A shorter hinge for a more compact setup.
• TAC41: Sized to fit the TAC41 sniper

----- Assembly -----

To assemble the folding adapter, you'll need:

-1 × 7x12mm compression spring (for the button, available on MakerWorld)

-1 × M3 × 16mm screw (to hold the button in the adapter)

-2 × M4 × 30mm screws + nuts (to clamp onto the Picatinny rail)

-1 small piece of filament (used as a hinge pin, melted on both ends to hold it in place)

Melt both ends of the piece of filament to lock the pin in place:

Some light sanding may be needed on supported areas for a clean fit.