Mk3 Concussion Grenade with Flying Handle

Summary

This is a life-sized model of the Mk3 A2 Concussion Grenade that has a spring-loaded flying spoon handle, so when you pull the pin and let go, the spoon handle will fly off like the real thing.  Concussion grenades, also known as Demolition grenades, produce a concussive shockwave that disables those in its vicinity.  It also produces a fragmentation effect, but less than a true frag grenade. This grenade was originally developed all the way back in 1918 and was developed into the Mk3A1 which saw usage in WWII.  Later it was developed into the A2 variant, which is what this model is based on.

( ! ) Do not sell my prints — I have not authorized selling prints.  If you sell my prints on Etsy, Amazon, eBay, etc, I will find out.

There's 3 ways to enjoy this model:

1. Metal Spring – if you have a metal spring, even a pen spring will often work, then print the metal spring profile.  It is designed to work with the Bambu Store's 0.5x7x12mm spring (linked lower on the page).
2. Plastic Spring – if you don't have a metal spring, but still want the handle to fly off, then print the plastic spring profile.  (see details below for more info about plastic spring)
3. No Flying Handle - if you don't want the handle to fly off and just want a grenade model, simply print the metal spring profile and don't put a spring in it.

The prototype plastic spring version requires no metal spring and can simply be printed.  I would still recommend using the metal spring version if you have a metal spring because it is much more robust, however, you now have the option to print a plastic spring.  If you do print the plastic spring version, keep in mind that the spring can become less “springy” with time unlike metal springs, so I recommend that when you aren't using the grenade that you leave the spring released to increase its lifetime.  Some users have found that Matte and Silk filaments are more brittle, so if you have trouble I'd suggest trying out PLA Basic filaments for the peg spring.

Bambu Filaments used were:

• Matte Dark Green
• Matte Yellow
• Metal Copper
• Silk Silver

Assembly is super simple, here's the instructions for the metal spring and then below that for the plastic spring.

Metal Spring Version Assembly (shows flashbang, but its the same for mk2, lol):

Plastic spring version assembly (for the mk2, but its the same idea for the mk3):

( ! ) Do not sell my prints — I have not authorized selling prints.  If you sell my prints on Etsy, Amazon, eBay, etc, I will find out.

This 3D print is intended for decorative purposes only and is not suitable for children. Small parts may present a choking hazard and edges may be sharp. By printing this 3D print, you assume all liability for any harm to yourself or others resulting from its use.