Retro-Arms 9mm Slick Side A1 AR-15 Upper Receiver

Retro-Arms is all about bringing you the best in old-school builds and classic styling for your rifles. The A1 slick side upper receiver is made for fans who want that real vintage look, but still want excellent modern function. Here, you'll find everything you need to know about this legendary upper and how it can become the heart of your next retro project. If you love rifles that tell a story, the A1 slick side upper receiver is a must-have part. This was the kind of upper used in early milit