Nautilus | Customizable Pepperbox

Update 27.1.2026: Added a longer barrel axle to the root, this is about .5mm longer than the original so it should sit perfectly flush instead of under tension like the old one. This might result in a loss of performance.

If you dont want to self-source the hardware, grab a kit from OOD

Overview:

• Stylish steampunk-esque toggle lock pepperbox with automatic barrel rotation on prime

• A ton of options ranging from priming levers, stocks to optional hardware builds for better performance and barrels for elite, mega, megaXL and triple shotgun blasts

Printing and hardware:

• 3 Walls 20% infill for color A and color B, 6 Walls 20% infill for color C. No supports, all parts preoriented

• Note that if you cant get a good seal out of rope you can build the no hardware version and just use the plungerhead from the hardware version with 2 #123 Orings and get an ok seal with that.

• Base blaster is in folders with ColorA/B/C, modifications are in other folders

• If you dont get a good seal with a polycarb plungertube, its not seated right and wiggled back out, push it back in and print the Plunger tube shim to keep it pushed forward

• If the #016 Oring in the Plunger Face wont stay in check for sagged lines and push them up a bit

Showoff video: 

Assembly guide: