HG-138 Mini Grenade Launcher

A mini grenade launcher made almost entirely of aluminum,
naturally using CNC machines. It can fire up to 40 BBs with a single squeeze of
a trigger and is compatible with RIS 22 mm rails in short and long firearms,
which allows for escaping from troublesome situations during even the most
dynamic of CQB games. Ideal also for scenarios combining green terrain and
buildings. What’s interesting is the fact that the grenade launcher features an
additional RIS rail on its bottom, which allows for the attachment of an
additional grip or… another micro grenade launcher. 

HG-138 is excellent as an “underbarrel
shotgun” of compact size.