Noveske equipment will interchange with Armalite upper/lowers and vice versa. Technically, Noveske calls thier AR the N6. And, they make some pretty nice stuff......of course I'm kinda biased....I've been drooling over the 12" Leonidas upper assembly for one of my Armalite lowers (I'm also a big Armalite fan). Pretty much, it's the two different platforms representing 7.62 (308) in the AR world. Armalite and Noveske.....and then all the others....LWRC, POF, DPMS, KAC, blah, blah,blah (I think everybody gets it). Welcome aboard Doc. Ron