- AR-15 Vise Block
Not necessary but I think it is easier to assemble with one. Especially the front takedown pin detent.

- Roll Pin Punches

I used a single 1/8" punch (Stanley from Lowes) to assemble 3 ARs. Mine wasn't brass which means you need to be more careful. I just tapped around the area I was working on in case I ever slipped.

- Roll Pin Holders

Wheeler pivot detent tool. $7-8 will have tool which makes it easier to install the front detent and will have a roll pin starter you can use on the bolt catch.

- Bolt Catch Pin Punch

See the wheeler tool.

- Starrett 264E Center Punch for Staking Castle Nut

Hard core AR guys and operators all say stake the castle nut. I didn't stake mine and I've never had a problem. Mine are just range toys though.

- Stock Wrench
I don't even know what that is

- Ball Peen Hammer (4 Oz.)
I used the handle of a polymer handled screwdriver to hammer in the bolt catch roll pin. That way it wouldn't scratch my receiver. Actually just started it with the screwdriver handle and wheeler detent tool and got it 98.52% of the rest of the way with pliers covered in tape. Much easier than hammering. BTW the red tubes you get with bottles of stuff like WD40 work great to hold the bolt catch in alignment as you hammer in the roll pin. I finished with my 1/8" Punch.

- Nylon/Brass Hammer
Everything I own is a hammer. Used the polymer handle of a screwdriver.

- Brownells Pivot Pin Detent Installation Tool
I would recommend the wheeler tool. $7-8 from amazon or Academy. Not necessary but helpful.

- Additionally a small diameter non-marring punch or something similar like a Takedown Tool is needed to depress the Magazine Release Button far enough in to properly install the Magazine Catch.
Rubber eraser end of a pencil worked for me.

Only special tools I bought to build ARs are the magwell vise block, wheeler detent tool, and a combo barrel wrench and castle nut wrench. Just be careful when you are doing the front detent and the spring loaded pin thing that holds in the buffer. You could easy poke out an eye with either.