Trijicon RMR (?) red dot micro

Got this on a trade and second owner. Don’t know much about it but was told it’s an RMR. Not sure if it’s legit, so low price, but I can personally vouch that it held perfect zero on my 7.62x51 sitting on top of my acog until my gun was banned. My loss, your gain etc., caveat emptor and all those fun things. 

I can also throw in the acog-mount part that connects the bottom of the rmr to the acog for $25. 

Comes with rmr to picatinny mount and also with dust cover