04-11-2018, 02:08 AM
jkingrph Wrote:Building an AR is not that difficult. Other than a couple of special wrenches, one for the barrel nut other for the receiver extension tube, I forget the proper name, that holds the action spring, an action block so you can hold the upper in a vice will be very desirable, I guess not absolutely necessary, but it will help a lot. Torqueing the barrel nut properly so one of the notches lines up with the upper receiver hole for the gas tube is a pain. I built most of mine with gas piston operating systems, and assembly is basically the same, just align the nut the same ( for operating rod vs gas tube) and go. Lowers although a bit more complex with trigger group, bolt release, mag release, are much easier. The main thing is to look things over and go slow.
Many manufactures now make proprietary barrel nuts that do away with timing the holes for the gas tube. I used aero precision uppers, comes with wrench head to attach to your torque wrench, bed barrel lug, grease nut, hand tighten, let sit 24 hrs for bedding to cure, torque down in 3 steps. Assemble hand guard, it is so simple.