Gravity Falls Mable's Grapple Gun - WORKS!!!

This is my version of Mable's Grapple Gun. I made this for my son and daughters halloween costumes. Feel free to remix and post however you like. We love Gravity Falls and wish it would return.

Internals were inspired a lot by a nerf dart gun model.

You will need a spring, screws, and nerf darts for the grapple hook. The darts will have a tight fit.

The pieces will need supports and are easily removed. I also reccomend light sanding but the Bambu typically has clean break supports.

Use the pictures to put the internals together.

The grappling hook can be inserted into a nerf dart and fired. Feel free to scale it up and down based on the legit or knock off darts you have. Its also a snug fit.

Non-printed Components:

Qty, McMaster part number, Description

(1) 9657K434
Primary Spring 3" long, .660 OD, .062" wire
(9657K428 or 9657K432 can likely be substituted for a less powerful and more child friendly blaster, though this is currently untested)

(1) 9657K51
Catch Spring 1.375 Long, .187 OD, .02" wire

(1) 9657K51
Trigger Spring (same as catch, cut to .75in long)

(8) 90380A110
1/2in long #4-20 plastic screws

(1) 9452K26

114 Buna-N O-ring

(1) 1378K31
PTFE Grease (or similar)

(1) 48925K92
3/4" Sch 40 PVC 4in long