This factory Ruger AR upper receiver comes fully assembled, giving builders and owners a straightforward path to a complete rifle or a fresh top end for an existing lower. Ruger's AR components carry the company's reputation for rugged, no-drama American manufacturing — the same engineering that made the AR-556 line a mainstay of the market. An assembled factory upper takes the guesswork out of headspace and parts compatibility: pin it onto any mil-spec lower, add your bolt carrier group and charging handle as required, and get to the range.

In stock and ready to ship straight to your door from Dawson Defense, an Arizona-owned licensed dealer.