I think sticking to the TNA VR66 lineup, naming it a “TNA DM-66” would be pretty slick,
You’d be standing up to the VR66 3 gun quality/reliability brand, but against a pump action, DM Offcourse implying Detachable Mag, similar to how lots of popular shotguns name they’re non tube versions.
Personally TNA DM 66 or TNA DM 67 resonates the most to me.