A1 Slick Side 5.56mm Upper Receiver
About Company
As a firearms enthusiast and builder based in Texas, I’ve spent years working with different AR components, and I recently picked up the A1 Slick Side 5.56mm Upper Receiver from Retro Arms. Let me tell you this piece checks all the right boxes.
From the moment I got it in hand, I could feel the quality. It’s precision-machined from 7075-T6 aluminum and finished with a tough MIL-SPEC hardcoat anodizing. The fit was flawless, the finish was clean, and it dropped right onto my lower without any hassle. What really drew me in was the slick-side design no forward assist, just a clean, minimalist upper that keeps things lightweight and true to the classic A1 look.
I bought this for a retro-style AR build, and it delivered exactly what I was after. The vintage profile feels authentic, but the machining is spot-on modern. There’s no rattle, no play just tight, reliable construction that I know will hold up at the range or in the field.