Water Warriors Pulse Master Internal Pics posted for those interested.
Opening this blaster was not too bad. The hardest part was popping off the pump-cap that seemed to be partly glued in place. Used a pair of pliers to snap the adhesive and the ring slid off afterward. Seems to hold in place now that I've gotten the blaster back together, though I may consider adding a little tape since it may get nudged by the pump grip during pumping.