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Heavy Barrel / HBAR AR-15 Uppers

Looking for precision, durability, and unmatched performance? Our Heavy Barrel (HBAR) AR-15 uppers are built for shooters who demand superior accuracy and heat resistance. Each upper receiver is assembled with premium components for maximum consistency and reliability, whether you’re shooting from the bench, hunting, or running extended training sessions. Also great if you need a heavy barrel for compliant builds.

HBAR (Heavy Barrel) uppers feature thicker barrel profiles that minimize barrel whip and maintain accuracy during high-volume fire. Available in popular calibers like 5.56 NATO, .223 Wylde, and .300 Blackout, these uppers are ideal for precision builds and long-range shooting platforms. Choose from carbine-length, mid-length, or rifle-length gas systems, and customize your setup with free-float handguards, M-LOK rails, and optics-ready upper receivers.

At Mid State Firearms, all AR-15 uppers are assembled in the USA using quality parts and components to ensure reliability and tight tolerances. Pair your HBAR upper with one of our premium lower receivers or complete rifle kits for a ready-to-perform system.

Shop Heavy Barrel AR-15 Uppers today and experience improved stability, accuracy, and performance from your next build.