Expo Arms Upper
Receivers

Primary Arms is proud to announce a new collection of Barreled AR15 Upper Receivers from Expo Arms. These hand-built upper receiver groups combine all of Expo Arms’ American-Made upper components into a single build, ensuring both quality and precision with a lifetime guarantee.

16" PATROL

16" Patrol Series Upper Receiver

For rifles, the Expo Arms 16” Patrol Series Upper Receiver offers an optimal balance of precision, ergonomics, and reliability for exceptional performance at any distance. The nitride finished barrel features an 11-degree precision crown and 1:7 twist rate to help you get the most from premium 70+ grain projectiles.

Quality Guaranteed

Expo Arms commits to quality without compromise. From first-rate materials and manufacturing to a leading lifetime warranty, Expo Arms products reflect a commitment to core performance.

11.5" PATROL

11.5" Patrol Series Upper Receiver

Prioritizing versatility with a compact footprint, the Expo Arms 11.5” Patrol Series Upper Receiver is the perfect addition to any general-purpose AR pistol or SBR build. This upper receiver is available with either a standard A2 birdcage flash hider or an enhanced XP1215KM single-chamber muzzle brake.

CQB

10.3" Combat Series Upper Receiver

Optimized for close-quarters maneuverability and suppressed shooting, with a handguard designed for strength and rigidity the Expo Arms 10.3” Combat Series Upper Receiver brings premium-quality components and performance to an unprecedented price point. This upper receiver is available with either a standard A2 birdcage flash hider or an enhanced XP1215KM single-chamber muzzle brake.

Expo Arms/FCD Extended Single Chamber Muzzle Brake - Dead Air Keymo Mount

Working with Forward Controls Design, the Expo Arms XP-1215KM has been designed from the ground up to provide your favorite Dead Air KeyMo compatible suppressor with a life-extending sacrificial baffle while also functioning as an effective single-chamber muzzle brake when not being used as a suppressor host.