New Frontier Armory C4 Upper Receiver AR-15 Multi Caliber Billet 7075 Matte

The New Frontier Armory NEW FRONTIER C4 UPPER RECEIVER delivers a precision example of AR-15 compatibility and multi-cal versatility, machined from 7075 billet aluminum with a matte black milspec finish to provide enduring strength and a clean, low-profile appearance for your next build. This stripped billet upper is designed to integrate seamlessly with all standard AR-15 components and most aftermarket parts, enabling you to tailor the platform to your exact specifications while maintaining reliable alignment and repeatable accuracy. Built in the USA, this upper receiver combines robust aluminum construction with thoughtful tolerances to support multi-caliber configurations and a wide range of barrels, handguards, and upper assemblies. The 3.20 x 3.40 x 9.70 inch footprint ensures a compact, rigid interface that contributes to improved heat dissipation and consistent sight alignment during high-volume or precision-focused shooting. Whether upgrading a current rifle or assembling a new primary platform, the C4 upper from New Frontier Armory provides a durable, versatile foundation that supports AR applications with confidence and straightforward compatibility.