Went to a hobby store today. I should have called before hand, but I wanted to go look around. After having perused the aisles I asked where the small screws and taps were. The clerk pointed me over to a display. I have never seen so many, teeny-tiny machine screws. Obviously for very serious model makers. Did you know the size gets so small, they just call them "0" (zero)? And, yeah they had appropriately sized taps, dies, screw drivers, wrenches and nut drivers. Ended up ordering what I wanted from Tower Hobbies. Be a week more.
In the meantime, I took the rifle to the range, along with AR pistol. Everyone there thought it was a neat project, though one fella was upset I had cut down the barrel on a hexagonal receiver. (Hey, barrels can be replaced.) Everyone also warned about the earth shattering, seismic event alarming, and blinding muzzle flash. Wrong. It was pleasant to shoot. Less loud than my 16" .308. And a lot less flash than a some ARs I've seen. Did it standing and was using Winchester soft point ammo.