Maybe not for everyone - Faxon Firearms AR15 Upper Receiver Groups 1

Sharp looking monolithic upper! After slight adjustment to the lower hand gaurd screws, it fits great on my Spikes lower. No hammering, filing, no stress. No buffer assembly, so you can rock a folding butstock, or forgo the stock for a shorter profile. Cycles through ammo like a dream, groups improved to .5 MOA, & recoil is significantly less. Ive got a thermal scope on order, going to set this up for night predators, pigs & such.