Who said you couldn't mount a grenade launcher on a pistol? If we try to attach a M203 below a Glock won't result as operative. Now, we have the solution.
The new mini grenade launcher by Zoxna is an interesting option to bring to our pistol to shoot 40bbs in a single shot.
This mini launcher is available in red and black, produced in aluminum, powered by green gas, and it can be attached to any weaver/picatinny standard rail.
And best of all is that you can either attach it to your pistol or rifle, just as you prefer!