NavyshooterM40 CAPT USN (ret) Full Member Minuteman Sep 19, 2010 504 123 Texas Aug 5, 2022 #1 Aug 5, 2022 #1 Purchased CMMG .22LR barrel from Midway. Do you use a M4 or Rifle cut upper for .22 builds. Thanks
6 6.5SH Two Star General Full Member Minuteman Jul 24, 2020 6,423 11,514 Aug 5, 2022 #2 Aug 5, 2022 #2 Doesn't matter which you use. The .22 chamber and feed ramp is well outside where the standard AR barrel extension ends.
Doesn't matter which you use. The .22 chamber and feed ramp is well outside where the standard AR barrel extension ends.
