HELP with upper build

[SIKwitIT]

Im in the process of building another AR, i have built a lower but never an upper. What all do i need? Any tricks for assembly? Any and all info is apperciated.

So far i have
Upper receiver, barrel, gas block, gas tube, gas tube pin, barrel nut, and a samson rail

[Don29palms]

Now you need an action block, an armorers wrench, a vice and a torque wrench.
Brownells has some good videos for AR assembly. When you torque the barrel nut you might have to tighten and loosen then tighten it a couple times for it to line up correctly. Just take your time and enjoy it. There is some real personal satisfaction from build your own rifles.