Fortis Manufacturing Fortis Billet Upper Receiver AR-15 5.56 NATO Anodized

The Fortis Manufacturing Fortis Billet Upper Receiver is a precision-built, stripped billet M4 upper designed for AR-15 platforms, finished in a durable black anodized coating that combines rugged performance with a clean, professional look. Engineered for 5.56x45mm NATO capability, this upper delivers a tight, repeatable fit with AR-15 receivers, promoting reliable chambering and consistent alignment for enhanced accuracy. Crafted from high-grade billet aluminum, it offers improved ergonomic co