Aero Precision Assembled Slick Side AR-15 M4E1 Upper Receiver - No Forward Assist - Black (Color: Black)

Billet-Like Slick Side Upper for Lightweight AR-15 Aero Precision now offers the M4E1 version of their assembled slick side upper. You get the sharp angles and sleek facets typical of billet receivers, with the light weight and durability of forged aluminum. You also save weight, with lightening cuts on the top rail, and a lack [...]