S-Thunder Double Barreled 40mm Grenade Launcher

I'd like to see this next to a Goblin Deuce!

Specs (provided by S-Thunder):

Short Barrel Grenade: 
- Powered by: CO2 / Green Gas / Top Gas 
- Size: 4cm diameter, 11.5cm height 
- Filler: 33mm foam balls, color / smoke powder, confetti 
- Filler Volume: 2 foam balls (included in package) 
- Sound Volume: 90 dB (CO2 gas) 
- Firing Distance: 15 - 20m (CO2 gas)  
Long Barrel Grenade: 
- Powered by: CO2 / Green Gas / Top Gas 
- Size: 4cm diameter, 18cm height - Filler: 33mm foam balls, color / smoke powder, confetti 
- Filler Volume: 4 foam balls (included in package) 
- Sound Volume: 90 dB (CO2 gas) 
- Firing Distance: 15 - 20m (CO2 gas)

S-Thunder says that the final grenade launcher will be cosmetically different, as the one shown above is just a prototype. No price is listed for the launcher as of yet and there is a single barrel handheld launcher also listed on their website (seen below).