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Quarter Circle 10 .40 SW Barrels Up to 10% Off w/ Free S&H — 3 models

Quarter Circle 10 .40 SW Barrel, 7.5in, .578-28 Thread, Black Nitride, QC-BRL-40-7.5
Quarter Circle 10 .40 SW Barrel, 7.5in, .578-28 Thread, Black Nitride, QC-BRL-40-7.5
Quarter Circle 10 .40 SW Barrel, 7.5in, .578-28 Thread, Black Nitride, QC-BRL-40-7.5
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Quarter Circle 10 .40 SW Barrel, 7.5in, .578-28 Thread, Black Nitride, QC-BRL-40-7.5
Quarter Circle 10 .40 SW Barrel, 7.5in, .578-28 Thread, Black Nitride, QC-BRL-40-7.5
2 of 2 images
Quarter Circle 10 .40 SW Barrel, 7.5in, .578-28 Thread, Black Nitride, QC-BRL-40-7.5

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Questions & Answers
Will this work with Areo EPC set? Expert Answer

The Quarter Circle 10 .40 SW Barrels should work with the Aero Precision EPC. However, I recommend contacting Aero Precision to confirm compatibility.

by Hunter, Gear Expert, July 21, 2022
See 1 More Answer
Is thread size 5/8x24 or .578-28? Both are listed on page Expert Answer

The Quarter Circle 10 .40 SW Barrels have a .578-28 threads.

by Hunter, Gear Expert, March 27, 2023
View All Q&A You Have a Question? Ask!

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Product Info for Quarter Circle 10 .40 SW Barrels

QC10 .40 S&W barrels are threaded for the attachment of flash hiders, suppressors, and accessories, and finished with a nearly indestructible protective treatment. Barrels have a medium outer profile and come in a variety of lengths to suit any need.image

Note: Barrels are measured from the end of the muzzle to the end of the breech/feed ramp. Approximately 1? of the barrel rests inside the upper receiver upon installation, resulting in an installed length of 1? less than listed overall length.

The installation of a pistol-caliber suppressor requires the use of a fixed barrel spacer. See your suppressor manufacturer for information on the requirements of your particular model.

Specifications for Quarter Circle 10 .40 SW Barrels:

Manufacturer: Quarter Circle 10
Color: Black Nitride
Finish: QPQ Nitride
Fabric/Material: 4150 CMV Steel
Cartridge: .40 S&W
Threads per Inch: 5/8x24
Barrel Twist Rate: 1-16
Gun Make: AR Platform
Gun Model: QC10 Blu' Whistler, QC5, QC10 Rider, QC10 Ranger

Features of Quarter Circle 10 .40 SW Barrels:

  • .75 (medium) profile Note: Barrels are measured from the end of the muzzle to the end of the breech/feed ramp
  • Approximately 1 of the barrel rests inside the upper receiver upon installation
  • resulting in an installed length of 1 less than listed overall length.
  • The installation of a pistol-caliber suppressor requires the use of a fixed barrel spacer
  • See your suppressor manufacturer for information on the requirements of your particular model.

Package Contents:

  • Quarter Circle 10 .40 SW Barrels

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Quarter Circle 10 .40 SW Barrels Orderable Models

List of Orderable Models

Quarter Circle 10 .40 SW Barrel, 10.5in, .578-28 Thread, Black Nitride, QC-BRL-40-10.5 , MPN: QC-BRL-40-10.5 , Code: 3KL-ATB-40SWB-QC-BRL-40-10-5
Quarter Circle 10 .40 SW Barrel, 7.5in, .578-28 Thread, Black Nitride, QC-BRL-40-7.5 , MPN: QC-BRL-40-7.5 , Code: 3KL-ATB-40SWB-QC-BRL-40-7-5
Quarter Circle 10 .40 SW Barrel, 16in, .578-28 Thread, Black Nitride, QC-BRL-40-16 , MPN: QC-BRL-40-16 , Code: 3KL-ATB-40SWB-QC-BRL-40-16

Quarter Circle 10 .40 SW Barrels Unavailable & Discontinued Models

List of Unorderable Models

Quarter Circle 10 .40 SW Barrel, 5.5in, .578-28 Thread, Black Nitride, QC-BRL-40-5.5 , MPN: QC-BRL-40-5.5 , Code: 3KL-ATB-40SWB-QC-BRL-40-5-5
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