I have no idea how this came to mind, but I we've got a revolving single-shot cylinder for my favorite printed Nerf platform, the Meaker Mk18.

Revision 25 Sep 2019

• Expanded barrel diameter to .51 for easier loading
• Added sealing ridges
• Expanded mounting slots to match R4
• Expanded base for better seal and rotation
• Added SolidWorks parts and .step files for your editing pleasure

Airwolf 3D

Axiom Dual

Doesn't Matter

Yes

The whole thing is held together with just an 8-32 screw through the long hole in the front of the cylinder. Sorry, metric users; I have a hard time finding metric screws in my area. But if you have a suggestion for an alternative, please let me know and I'll revise the files.

Also, you're going to need a gasket between the cylinder and base at least. I used 3mm craft foam from Michael's and it seems to work well enough. My first draft also needed a gasket between the base and the front of the blaster, but I think this version should be okay.

Also too, I'm including an indexing tooth to help center the barrels in line with the plunger opening. It's a stiff enough assembly without, but consider using it if yours feels loose.

And just to keep all my bases covered, I'm including the SolidWorks files for those who might want to try and tweak it themselves.