Thunder B – Maximum effect with the wildest grenade in airsoft
If you want to clear a room in style, Thunder B is your most important tool. Thunder B from Hakkotsu is not a BB grenade, but a pure sound and distraction grenade (flashbang style). It uses a standard 12 g CO2 capsule to burst a plastic shell, resulting in a deafening bang of over 130 dB. We carry everything from complete starter kits to the different types of spare shells.
How does a Thunder B work?
The system is simple and very reliable:
The core unit: A reusable metal mechanism with pin and release lever.
The shell: You screw a single-use plastic shell on over it.
When you pull the pin and throw the grenade, the mechanism punctures the capsule, the pressure builds rapidly, and the shell bursts with a bang.
Different shells for different missions
We stock several types of shell from Hakkotsu, so you can tailor your tactical advantage:
Dumbbell & Cylinder: The classic shapes, easy to throw accurately and giving the sharpest bang.
Pineapple: The classic "hand grenade look", which looks great on your GFC Tactical vest.
Shocker: Designed to burst at a specific pressure for maximum sound output.
Tactical advantage in the game
A Thunder B is all about psychological warfare. When the grenade lands in a room, the opposition loses its bearings for the few seconds you need to move in. Because the grenade does not fire BBs, it is often allowed at sites where regular grenades can be a problem, but always check the local rules for sound grenades.
Maintenance and safety
To make your Thunder B work every time, we recommend:
Lubrication: Give the seals of your core unit a little silicone oil or Brunox every 3–5 throws to keep them sealing tight.
Safety: Always wear hearing protection and safety glasses when testing or using the grenades near others.
Want to be the player the opposition dreads meeting in close quarters? Visit our shop in Aulum, Denmark, where we can show you how to assemble and prepare your Thunder B, or contact us for advice, so you are ready to cause chaos on the field.
Choose your airsoft gun, air rifle, air pistol or launcher, and we’ll show you which parts, ammo, sights and accessories fit it – across the whole shop.
Bought it somewhere else? Choose a standard type:
My Gun is in beta and under continuous development. It is built by our technicians with help from AI and can make mistakes – if in doubt, ask us before you buy. Read the disclaimer – and help us make it better.
