Picatinny mounted silly shell blaster

Silly shell blaster using mostly hardware you can harvest from an x-shot longshot or removed from it after upgrading. (exception: front O-ring to seal with shells, and nuts/bolts for mounting)Can fire 6 sealed half darts but isn't powerful enough to launch triple rival consistently or very far (works with 2 rounds). Cut down K25 recommended for better power.various priming rods and plunger heads to try to get a smooth fit and decent seal. Screws can all be substituted by any that screw into a 3mm hole (and some versions use 2 m4 screws for part of the plunger head). Using 43mm od 39mm id stock plunger tube (use tape to fit into the back) and stock spring from the longshot.