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Is thread size 5/8x24 or .578-28? Both are listed on page — 2 Answers

by B, from NC, United States Asked on June 14, 2022

Name Quarter Circle 10 .40 SW Barrels
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Answered by Hunter, Gear Expert, from OH, United States, on March 27, 2023

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

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Answered by Charlie Thompson, member, from FL, United States, on March 12, 2023

Mine was .578. Wouldn't thread on at first. Had to clean threads up with die to get my muzzle device to start. Using Kaw Valley XL comp on 10.5 ". Aero EPC Enhanced upper, 11" handguard. Linear comp a little short for my liking, so I went with the XL for a little more length. Works well. Ct

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