QUARTER CIRCLE 10 | Billet Rear Charging Upper Receiver
QUARTER CIRCLE 10 - The AR15 Pistol Caliber BRAND - Billet Rear Charging Upper Receiver
- Designed and milled in-house specifically for pistol-caliber AR builds
- 7075 Billet Construction
- Widened ejection port for large pistol caliber pistol cases
- Made For the AR Platform- Not Modified
- 7.54 oz stripped weight
- Handguards with overlapping anti-rotation tabs may not be compatible with QC10 billet upper receivers, including Side Charging uppers.
*This product is not compatible with DI gas systems or rifle-caliber bolts