Weight of many monolithic uppers is a comparative drawback, though not much of one. Were LMT to ever roll out a modular-railed (attachable rails to a round handguard) version of their MRP, then they wouldn't be able to keep them in stock.

Billett recievers have little functional appeal - I still have two sets, but I think those days are behind me. They are visually stunning rifles, and shoot very well, but my most accurate rifle uses a lowly forged upper, and both of my billet lowers are tighter in the magwell than my forged units, and have little added flaring as well.

I really like my billet units, but when I see guys spending money on those parts and then skimping on BCG components, then that makes me wonder and worry.