Spring Thunder barrel for Mistresskey

Replace the barrel of your Mistresskey with a Spring Thunder shell to turn it into a modular blaster and shoot any ammo type you like. Won't help to reload quickly, but during a zombie apocalypse you can shoot any ammo you scavenge, or if you'd rather just have a shotgun blast of Rival balls or a long range half-dart than a Mega shield buster.

You should be able to use a -112 o-ring to improve the seal of the shell, but I haven't tested that and mine is working fine without it. If you are building a Mistresskey from leftover bits and pieces from a Caliburn build or something this also eliminates the need for the aluminum Mega barrel that you might not have on-hand.