Aero Precision M4E1 / C.O.P. Barrel Nut – APRH100153C – New in Package near Surprise, Phoenix, AZ

Brand new in the original Aero Precision packaging, part # APRH100153C. This is the barrel nut for Aero's M4E1 C.O.P. (Continuous Optics Platform) uppers. The C.O.P. line is discontinued and these nuts are getting hard to find — if you're building or repairing a C.O.P. upper, here's your part.

Price: $30

Location: Local face-to-face meet in Surprise (Loop 303 and Waddell).

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