Update 16th Jan 2023

Resized screw holes on the door and spring rest pieces, these are now labelled v3. The holes no longer need to be drilled to the correct size to work with Nerf screws, but M2 screws will no longer work. The catch piece is the same, the v2 file is still accurate.

Replacement for the Slingfire's floppy jam door that refuses to stay shut. Three separate pieces, total print time is about three hours. With this, you'll have a jam door that locks shut and doesn't wobble or rattle, with a spring-loaded sliding piece to open the door should the need arise.

Hardware:

• 2x Nerf shell screws; designed to accommodate the longer 11mm screw typically used on most shells, also works with the shorter 9mm screws that are used on rail sections of Nerf shells.
• pen spring; maximum 4.5mm diameter.
• 2.5mm metal rod; reuse the one from the stock jam door.

Creality

Ender 3

Doesn't Matter

Doesn't Matter

Any

<20%

Print all parts in their current orientations.

The door and the spring rest print fine without supports. The catch may need a dot of support on the end but you may be able to get away without any support as well.

All parts are mostly walls, infill doesn't really matter.

Depending on your printer's dimensional accuracy, you may need to drill the hole on the end for the swivel rod to ensure it's actually 2.5mm.