Quarter Circle 10 AR Side Charging Upper Receiver

The Quarter Circle 10 Side Charging Upper Receiver is a highly rigid upper receiver designed specifically for pistol-caliber AR builds. Our upper receiver design is derived from the industry-first Gibbz Arms G9 receiver, and with the help of Gibbz engineers and our pistol caliber expertise, we’ve brought you the best possible choice for a dedicated pistol-caliber build. Specifications for Quarter Circle 10 AR Side Charging Upper Receiver: Manufacturer: Quarter Circle 10 Color: Black Anodized Fabric/Material: 7075 Billet Cartridge: 9mm Luger, .40 S&W, .45 ACP Gun Make: AR Platform Gun Model: AR-15 Included Accessories: Standard Condition: New Features of Quarter Circle 10 AR Side Charging Upper Receiver: Latching non-reciprocating left side charging handle; Spring-loaded rear door minimizes blowback when firing suppressed; Widened ejection port for clean ejection of large-bore cartridges; Slick side aesthetic perfectly complements QC10 Lowers; Compatible with GSFGLF and CLT9MM Lowers; This model not compatible with QC5 lower or QC10 Keymod Handguards; QC10 Side-charging uppers designed and manufactured with Gibbz Arms technology; Handguards with overlapping anti-rotation tabs may not be compatible with QC10 billet upper receivers including Side Charging uppers; Package Contents: Quarter Circle 10 AR Side Charging Upper Receiver