NERF Dart Speed Loader

Description

The speed loader attachment provides a quick and easy way to re-stock your Worker straight magazines and extends the capacity to 18!

The speed loader also needs a pusher to push the mag plunger down into the Bucket and to keep the darts aligned when refilling. The provided Pusher model fits onto a 3/4"  wide, 1/8" thick bar (feel free to make a Pusher for yourself!).

The model does require extra parts to work, please see the materials table below.

Demo

Printing

Designed for FDM printing; all models do not require supports.

Clamp Right & Left

• 0.4mm: print with 4 walls
• 0.6mm: print with 3 walls

Bucket

• Recommended to print with a brim

Draw Latch

• Print 2
• 0.4mm: print with 4 walls
• 0.6mm: print with 3 walls

Plunger Latch

• Print 2

Assembly

Insert the M2 heat-set inserts into Clamp R.

Insert the M4 heat-set inserts into the Draw Latch.

Align the Plunger Latch hole with the bottom small holes on the Bucket with the half-circle facing outwards. Take the cotter pin and insert through the Bucket and Plunger Latch.

Take the cord and wrap it around the Plunger Latch cutouts with slight tension, tie with a square knot and cut the trailing cord down to size (~1cm long).

Align the Draw Latch with the large holes on the Bucket and screw in the M4 flat heads. Stretch the 121 O-ring and inset into the slit in the latch; to help with assembly, align the latch spine with the top of the bucket, position the O-ring and pull slightly upwards while holding the latch in place with your thumbs.

Insert the M2 screws into Clamp L, if you need to screw it in make sure it's all the way in. Place the 116 O-ring in the ring slot on the inside of the clamp – point the inside of the clamp upwards when placing onto the mag (don't let the O-ring fall out!). Insert the O-ring into the other clamp, flip the mag over and carefully screw the two clamp halves together. There should be a small gap between the clamps and the O-rings should have a solid grip on the magazine.

Insert the Koda plunger then the spring into the mag, then slot the Bucket over the spring. Swing the Draw Latches out and hook the O-rings over the clamps and push back down to close.

Pusher

Either purchase the recommended bar stock (you may need to cut it to length), print the provided Pusher files, then press fit onto the stock. Or, design your own based on your preferred stock.

Post Processing

It's very likely the print will need some processioning to help reduce the chance the spring gets caught on the face between the bucket and clamp or if the pusher has trouble moving up into the mag. This will likely mean sanding down [show locations] to have the faces flush with one another. The spring catching likely won't go away, but you can give the attachment a firm hit to try getting it back to working order.

Using the Dart Speed Loader

Take your Pusher and push the plunger down into the Bucket until you see the Plunger Levers open and close slightly, the plunger and spring now contained in the bottom half of the Bucket – you may need to open the Plunger Latches to help slide the plunger past. Keep the Pusher in the mag and disconnect the Bucket from the clamp by opening both Draw Latches and removing the O-rings. 

Keeping the mag upside down, bring the Pusher to the very bottom of the mag, dragging it back out as you place more darts in. When the mag is at capacity, bring the Bucket back to the clamp, close, then squeeze the Plunger Latches to free the plunger.

Materials