Sceneryveas

 I have seen various forge markings on uppers and wanted to see who knows what about who made them, etc "A" or kind of "A" shape cut in half forge mark on right side of upper Keyhole forge mark on right side of upper M on the front of the upper above the gas tube hole (was told it was an "FN contract upper) Makers of Rock River Arms uppersIs Cardinal Forge "Not sure what their design is?Forged from 7075T6 aluminum, this stripped upper is precision machined to milspec M16/M4 specifications and features M4 feedramps Match this upper with one of our AR15 lower receivers for a solid and dependable fit Features M4 Feedramps250 takedown pin holes; Can Anyone Identify This Upper Receiver Colt Forum Ar 15 upper square forge mark