Barrel nut threads should be all the same on the ar15 platform, unless Bushmaster pulled a proprietary FU, do you have a dial caliper? Measure inside radius of the nuts.
Be sure to lubricate the threads with good oil AFTER cleaning them WELL.
Torquing to 30#, back of slightly, then to the next keyhole not exceeding 80#.
I could make a list of a bunch of guns i have, or "have", or wish I had. Why would one feel compelled to provide that infornation freely? Do you feel the need to show off? Is it some immature game of oneupsmanship?
Why do you feel it necessary to list your guns?