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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
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

Product No Longer Available

Unfortunately Quarter Circle 10 .40 SW Barrels is not listed by OpticsPlanet.You can also explore other items in the Gun Parts, AR 15 Parts, Rifle Parts, Rifle Barrels, AR15 Barrels yourself to try and find the perfect replacement for you!

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.

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

Ammunition

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Related Products to Quarter Circle 10 .40 SW Barrels

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
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, 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, 16in, .578-28 Thread, Black Nitride, QC-BRL-40-16 , MPN: QC-BRL-40-16 , Code: 3KL-ATB-40SWB-QC-BRL-40-16
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