the pmr 07 has a rail built in to the bottom of the gun, so any asa with a rail on it will fit. the pmr also has spots for mounting screws, so asas w/o a rail will fit as well. just beware that rails on the oops asa and the pops asa are different than the rail on your pmr, and you will have to use the unimount screws. hope that helps.
But there's no sense crying over every mistake
You just keep on trying 'til you run out of cake
And the science gets done and we make a neat gun
for the people who are still alive