I don’t know if there are multiple starts on the upper thread but I kept tightening and backing off until I got it to the point where it was adequately tight and one of the holes lined up. Getting the gas tube in took a little finagling but it’s in and pinned in place, and the handguards are in and properly aligned.

Tomorrow I’ll stake the gas key and I think that pretty well completes the build (other than either replacing the carry handle or fixing the one in place) The carry handle thing still annoys me, I ought to know when to stop. It’s just aluminum, dammit. I’ve broken 1″ taps for Christ’s sake.

Anyway, a few steps closer to being done. Stupid question: What do you do with a Fakog type sight with the regular sight still in place? Does it aim over the regular sight?