Stagecoach Side By Side Double Barrel Dart Blaster

Changelog: 11/03/2025 - Fixed priming bars missing from part drawings pdf.

Changelog: 02/21/2026 - Added hw kit suppliers for asia

What is this?

The Stagecoach Side By Side is a 3D printed nerf blaster that fires and ejects Sillyshells, which allows it to fire multiple darts at the same time. It is completely mechanical, with independent springs and plungers for each barrel. Dual staggered triggers can be configured to fire each barrel independently or both barrels at once.

Release Video

Sillyshells

This blaster uses Sillyshells, which are a hobbyist 3D printed shell standard that allows for many different types of foam munitions to be loaded and launched. See the Sillyshells file listing to print your own.

Print Settings

Refer to the Stagecoach Part Drawing Release pdf file for specific details on print settings, part orientations, and expected part dimensions. The files also include pre-configured bed layout project files for Bambu Labs printers.

By default, the standard colorway for this blaster has 4 colors. These are the ESTIMATED quantities of each that are required to print the blaster. Of course, feel free to modify the colors to your liking. Always print the Barrel Cap in orange for safety.

All of the multicolor engraved parts on this blaster can be accomplished without a multimaterial printing setup. Simply:

• Insert a pause in your slicer at the appropriate layer

• Print the part

• Manually change your filament color when the printer pauses

• Then resume the print!

Assembly Guide

Check out the assembly guide video for instructions on assembling your blaster:

Hardware

Check out the Stagecoach Official Bill Of Materials for all of the non-3d printed parts this blaster needs.

Availability

The following list of distributers have been approved to sell kits for this blaster. 

USA

• Hardware Kits, Assemble-yourself, and Full blasters available from Out Of Darts:
  https://outofdarts.com/products/femling-design-stagecoach-hardware-kit

ASIA

• https://ifb.sg/products/stagecoach-hardware-kit

EU, AUS

• No current distributers. Have your favorite nerf hobby shop reach out!

Safety

• Never touch either of these two orange parts while the blaster is primed. This will cause the blaster to suddenly close on your finger and will likely result in rapid unscheduled disassembly of blaster internals.

• Never put your fingers in either of these places while using the blaster. Doing so will result in damaged fingers.

• Never shut the blaster with the triggers pulled. This will prevent closure of the blaster and potentially cause damage.

• Always wear safety glasses when operating this blaster

• Always print the barrel cap out of bright orange filament.

Depriming

The Stagecoach works a little differently than other classic springer nerf blasters. It cannot be safely deprimed in the traditional sense. Instead: 

• Insert two “blank” shells, which are completely solid shells that do not allow airflow.

• Pull both triggers to ensure both plungers are relaxed

• Open the barrels partially to eject the shells without repriming the blaster

Trigger Configurations

There are 4 different trigger configurations:

• Right Handed Standard

• Left Handed Standard

• Right Handed Dual

• Left Handed Dual

Left/Right refers to the handedness of the user.

Standard Triggers fire each barrel completely independently, in any order.

Dual Triggers fire both barrels at the same time if you pull the rear trigger. This gives the option to fire the barrels one at a time or dump both at the same time.

These options are configurable on assembly. The same parts are used for left/right configs. Two additional 3d printed parts and one additional #4 screw are needed for a dual trigger config.

Reference the Stagecoach Trigger Configurations pdf file for details on the assembly of each configuration.

Extras

Assembly Jigs

• Files for two assembly jigs are included. These will help you press a few of the pins as you assemble the blaster.

Engraved Shells

• Matching Blank Shells and 1x Elite Shells

Slingpoint

• Grip slingpoint options for stock/stockless

Cutoff Stock

• Gives you that action movie look at the cost of a more difficult prime. Available with/without slingpoint

Pic Rail

• For when you need to be tacticool

Acknowledgements:

Special thanks to all of the beta testers who helped put this thing through its paces: Cole, Alan, Adam, Boomstick Mods, Dr Flux, senrath and Sakurazaki
The design was heavily influenced by other blasters like the SLAB, Linx, Goblin, Wildstyle, Alchemist, Yeethammer, and many more! Thank you for posting CAD!

***Disclaimer*** 

This is not a toy. This blaster is meant for hobbyists, not children. Blaster must be operated correctly to avoid injury. The designer is not responsible for any injuries sustained from assembling or using this blaster. A bright/blaze orange muzzle and barrel cap must be installed for safety. Consult local laws before building this high powered blaster.