Which barrel length is best for an AR-15? We perform the ultimate tests.

Everyone argues but few do, today we put our money where our mouth is and perform some testing on different barrel lengths to find the best barrel length. Patreon Signup - https://www.patreon.com/GarandTHumb Onward Research http://onwardresearch.com/ SDI School: https://sdischool.co/Garand Xidax...