Why I Chose a .308 Winchester AR – Part 2, by Dusty
(Continued from Part 1. This concludes the article.) Handguard and Barrel Nut The final parts of the upper include the barrel nut and handguard. The barrel nut is used to secure your barrel to the upper and is generally included as part of your handguard. There are some handguards that don’t supply a barrel nut so you will want to check for that when purchasing your specific handguard. You will also want to match your handguard, gas tube, and barrel to make sure they all match. Standard barrel lengths are 16, 18 or 20 inches. There are various gas tube …