Try it out, and specify your goal to the instructors over there. By scrolling through the instructors, I'm sure they'll have some knowledge they can pass on to you, with a lot of training partners.
Since you're not looking into something sportive (I'm assuming SD) but still within the realm of MMA-style training (which is sportive and physically intense) this might be a fit.
I do like the grappling/clinch training with a gun holster in mind. But from the videos, it seems very static... But then again, I haven't been there, so I highly suggest working out for a session, get a feel of the vibe of the place, and see if this is for you.
There are plenty of MMA groups that focus on what you're looking for. You'll probably find them in club form, with its members comprising of students from multiple schools, and want to focus on SD, LEO-SD, Close-Quarter Combat, weapons, etc. Heck, I'm certain almost any MMA school you visit might have a LEO there that might point you in the right direction if you ask around politely at the schools you do visit.