Quick view AERO PRECISION AR-15 M4E1 .223/5.56 Stripped Upper Receiver (APAR700201C) Aero Precision $104.95 Product DescriptionThe M4E1 Threaded Upper Receiver features a new angular machined design that helps it stand apart from standard mil-spec upper receivers. This upper receiver features the same enhanced body profile as our M4E1 Enhanced Upper Receiver... Compare Add to Cart Wish list
