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. The QC10 Side Charging Upper features:

• Latching, non-reciprocating, left side charging handle

• QC10 Stripped Glock Small Frame Lower Receiver with proprietary parts

• 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 GSF, GLF, 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

Weight- 10.2 oz