How I said. Only prototypes. And 10 rounds (12 gauge). Instead of the 16 in this pack.
:P
EDIT:
As an interesting additional feature, it is possible to take the drum magazine off the firearm, attach a detonator, and use it as an anti-personnel mine that fires all of the cartridges at once when tripped. The manufacturer advertised this as the "Beartrap."
That is very awsome, Pancore Jackhammer is now my personal favorite shotgun!