I would like to present my attempt to build skirmishable grenade launcher. I combined real M7A3 grenade launcher, MadBull 108 Round Rifle launch Grenade with Flashhider Adaptor and russian custom made certified airsoft grenade launcher with projectile (TAG Innovation)
BB shower mode
Projectile mode
So it can launch BB shower or projectile for 40-50 meters
This is a video of field test after last reenacting event
Looks good 
Really interested in doing this myself (was about to buy the discounted madbull off Fire Support but someone grabbed it first
) so I have to ask - Are you setting it off via the 8mm BB hitting the back madbull shell? And any sign of damage on it from it not being designed to use that as its trigger mechanism?
They're fairly robust, and designed to be set off using a 6mm round, so I can't imagine an 8mm one would make much difference.
Yes, no problems with 8mm at all.
cracking idea
"Take that you rotton helping of strawberry flan!"
Joseph Porta to "strawberrys and cream", in the sven hassel book ,ogpu prison
