Pull-Twist Safety Fuze For ThunderStrike V2 Reusable Airsoft Bang Snap/Ring Cap Grenade

This is the pull-twist fuze mechanism for the ThunderStrike V2. It allows for incredibly quick deployment and doesn't have a spoon or pin to lose, making it much more hassle-free. To deploy it, simply pull the wheel up and twist counter-clockwise. When in the down position, the arrows on opposite sides will point to 'S', indicating 'safe'. When pulled up and rotated, the arrows will point to 'F', indicating 'fire'.

(ONLY the Fuze mechanism. Body not included)

Hardware for fuze:
2x M2x10mm Bolts
1x Cut-down sniper spring (VSR-10, L96, etc.) 30mm in length.
M120-M130 strength. Exact dimensions of the spring are 1.3x10x30mm. Actual airsoft sniper springs are recommended, as generic springs tend to have too much coiling.
1x M4x55mm Bolt

Assembly:

Clean and process all printed parts, like you normally would. Sand on the inside of the wheel and other internal parts that make , but it's best to keep it minimal on external areas because it may look bad from the sanding marks.

Step 1: Thread the M4x55mm bolt through the Rotating Catch, all the way to the end. The bolt will create a thread in the plastic itself. Make sure it stays as centered as possible when screwing it in. We would advise adding a small amount of semi-strong glue (Generic glue, School Glue, Elmer's Glue, etc.) to the end of the bolt where it screws onto the Rotating Catch to the lock it in place, since it will be rotating with the bolt.

Step 2:Drop the bolt with the rotating catch into the opening of the Mechanism Body. Place the cut-down sniper spring into the bottom slot of the Mechanism Body, recommended the flat side of the spring (if using either of the ends or manually flattening one side) to be in that slot. While holding everything in place, screw on the Detonator to the bolt. It should once again create the threads for a tight fit. Tighten it until the bottom of the bolt is flush with the bottom of the Detonator.

Step 3: Place the Twist Wheel over the fuze Body and make sure that the two pieces that stick out from the wheel line up into the slots in the fuze body. Then, align the Top Cap with the screw holes and screw it in place.

PETG or PLA+ is recommended. Here is the exact filament we use (): https://amzn.to/424ouOW
Sliced with Bambu Studio/Orca Slicer, so some settings may need adjusting for Cura. Everything 0.16mm layer height, but 0.2mm works as well.

Main Fuze Body: Print upright. 3 walls. 55% Cubic Infill. Minimum 9 top layers. Enable s with a 15 degree threshold angle and 'snug' style. You want to have s right above the threads (but not in them) and also not in the letters.

Rotating Catch: Print upright on the flat face (the side that will be the bottom). 3 walls. At least 70% Cubic Infill. No s.

Twist Wheel: Print upright. 3 walls, 50% infill. Enable s with a 10 degree threshold angle and snug style.

Top Cap: Print with the top part facing up (you could do it upside-down to avoid s, but it will have the pattern of your build plate on top). 3 walls. 60% infill. Enable s with a 10 degree threshold angle and snug style. You want the s all on the inside (unless printing upside-down).