I have an AR 15 lower receiver with a M16 belly cut. If you don't know what a M16 belly cut truly looks like, then please move on! And yes you can purchase a M16 style lower on line much cheaper than this one. Will not respond to ( is it still available, or the price). Only have one and don't need it! 500$, price is firm! Text is faster, 1-717-586-8221.