QC10 9mm AR Bolt

Quarter Circle 10, THE AR Pistol Caliber BRAND. Leader in top of the line, dedicated AR15 Pistol Caliber parts.

9MM Glock Style Bolt Assembly

• Advanced blowback design
• Manufactured to function reliably with Glock 9mm magazines  
• Drop-in Installation
• 8620 Steel Bolt
• QPQ Nitride treated for maximum durability and wear resistance.
• Heavy Duty Extractor
• Removable mass