Not Long ago I've seen Several uppers which might be take offs from rebuilt M16A1 rifles getting bought as "new substitute uppers". So far as looking at an inexpensive priced m16 or xm16 magwell that is definitely salvageable, I’ve been periodically watching sales considering that June and lately each sale https://johnnydundg.bloggazzo.com/30638515/how-colt-combat-elite-commander-45-acp-can-save-you-time-stress-and-money