Adapter to connect Tokyo Marui MWS or other compatible GBBR magazines to an Odin (or a clone) winding speedloader. Mag latch to prevent mags from falling out when you're done, and a stop ball to keep BB's from spilling out (it'll still drop ~2 balls, but that's better than 15!) This one has a living hinge style magazine catch, which means you'll need to print this in something with some give, like PETG. PLA will collapse, don't use it.

Parts Needed:

1x M3x20 Socket Head Cap Screw

1x 1" Long, 0.24" OD, 0.2" ID Compression Springs (Ex. McMaster 1986K365 or 9657K298)

2x 6mm Airsoft BB's

Amazon Link for Springs:
https://www.amazon.com/gp/product/B0BG82DWN4

Assembly Instructions:

1: Insert a 6mm BB into the hole on same side as the magazine entryway, just above it. This is your stop ball, it will protrude into the BB feed path slightly when a spring is behind it.

2: Follow up with one of the springs, then another BB.

3: Insert a suitably long tool to drive the BB/Spring/BB down until the BB in the back clears the screw hole in the long side of the adapter - you'll see the BB pass by.

4: Drive in the M3x20 screw until it touches your tool, and make sure the BB is ahead of it. This keeps the screw away from your spring. Remove the tool and continue driving the screw until hand tight.

As a note, do not use stronger springs in the stop ball hole. Too much force will make loading unpleasant.

For printing, print the adapter on it's back (mag opening straight up) with supports on the bed only. If you have the ability to paint supports on, see the images for where you should support inside the magazine cavity.

Updates!
11/10/2024: Updated to V2. Found some dimensional issues that were causing loading problems.