Made For – Not Modified. Every QC10 product is engineered specifically for pistol caliber ammunition, not modified from an existing platform, increasing functionality, reliability and overall performance. Specifications for Quarter Circle 10 .40 S&W/10mm Auto Bolt Assembly: Manufacturer: Quarter Circle 10 Color: Black Nitride Finish: Nitride Fabric/Material: 8620 Steel Bolt Cartridge: .40 S&W Gun Make: Smith & Wesson Weight: 15.2 oz Bolt Material: 8620 Steel Features of Quarter Circle 10 .40 S&W/10mm Auto Bolt Assembly Advanced blowback design Manufactured to function reliably with any QC10 9mm platform Manufactured to function reliably with Glock .40 S&W magazines Drop-in Installation 8620 Steel Bolt QPQ Nitride treated for maximum durability and wear resistance Heavy Duty Extractor Removable mass Package Contents: Quarter Circle 10 .40 S&W/10mm Auto Bolt Assembly
J –
I only use QC10 when I want a premium PCC build. Their components are top notch and I've never been disappointed with their receivers or 9mm/.40 PCC parts.