OP- I'm debating selling my Cerro Forge A2 upper with M4 ramps to fund a slickside Colt LMG upper. IM me if your still looking and we'll talk. It's made by same company that makes uppers for Colt, FN, CMT, LWRC,RRA, etc. It's been shot maybe 4-5 times but cleanedafter every trip to my rage. it still looks brand new and I stil have the box, and receipt that came with it.