This was the second series of Zealot prototypes, after the v1.19 prototype but before the v3.51 prototype. Unlike the other Zealot parts, I did not personally manufacture this version. Rather it was outsourced to another machine shop in order to save time.
Zealot design was still in fluxuation even during the process of building the orange v1.19 prototypes that came beforehand. Upon finishing those markers, the design had already been altered so much to the point where we needed updated versions of the internals in order to continue testing. The design may not appear very different from the outside, but in reality all of the components had been updated to the point where they were no longer compatible with any surrounding items. Most of this was done for manufacturing reasons, to make the fabrication process easier.
The plan was to outsource the work to another machine shop in order to get the fabrication done quicker than it had happened with the previous v1.19 markers. However, ultimately the finished product that was delivered wasn't of acceptable quality, so these guns were never functional! They served as a testbed for several new ideas, but we weren't able to actually test them with these markers.
As mentioned, I was not in charge of this fabrication. The shop did a poor job with these items, so the only machining I did on them was to repair incorrect features in attempt to salvage the design.
Despite their problems, I had the two markers anodized to prevent them from being completely ruined over time. You can see pictures below:
The most important things we learned from these markers was a few smart alterations to the ergonomics. Functionally, the solenoid manifold system was the only portion of the gun that was tested. The flow restriction principals were used to make design revisions leading into the future prototype, version 3.51.