I’ll try to keep this as brief as possible.
I have firsthand experience with this exact situation.
Quick answer: In this application, the MT1000 is best suited for experimenting only. It will work, some of the time, at very close distances. It should never be relied upon for two way communications with any military transceivers at all.
I’m a lifelong radio nerd and hold a General class amateur license. I’ll keep the terminology simple.
About 20 years ago, I was assisting a state guard unit in obtaining radios from local agencies to augment their small fleet of PRC77s. We received a plethora of low band P200s, which are the same platform (Genesis series?) as the MT1000.
Even given the “wide as a barn door” receivers and wide TX of the P200, the closest CTCSS tone match was 151.4Hz, and the military-civilian transceivers worked sporadically at opening each others’ squelch across a room! Period. You can forget about reliable communication over any appreciable distance beyond line of sight.
Side note: If you’ve heard what a consumer-grade scanner sounds like when it receives a military radio transmission and shows it as 151.4Hz, it’s a sort of “off” audio, like you can understand the words clearly but tell it’s not being received perfectly. Hearing that on my scanners back in the day (and it still sounds the same today on my high end Whistler and Uniden scanners) gave me hope that the military-civilian experiment with 151.4Hz would work, but alas it does not.