First one:

Upper
Rock River Arms flat top upper
Bushmaster bcg
Midwest Industries steel railed gas block
Rousch Sports gas tube, Delta ring kit, charging handle, forward assist, port cover, flash hider
Magpul MOE handguards
Anderson 5.56 M4 barrel


Lower
Anderson Arms lower
Rock River Arms lower parts kit
Magpul MOE grip
Rousch Sports pistol buffer kit (yep, it's a fully functional PISTOL build hear that alphabet agency?)

Sights
Magpul Pro buis
Primary Arms red dot reflex



Second one

(same except for the following)

Upper
barrel Anderson 16" carbine 300blk
bcg Anderson
muzzle device Rousch Punisher
Rousch Sports 6061 railed gas block and gas tube
Squirrel Daddy ejection port cover engraved "300 Blackout"

Lower
(same)

Sights
Primary Arms red dot reflex yet to buy


Third one (yep, got the bug)
Anderson lower
(all else tbd, likely a 300blk pistol build)

Pictures to follow.

Any suggestions on iron sights?  Inexpensive red/green dot sights?  Thinking Primary Arms red dot reflex now...

Magpul MBUS for good sights that don;t break the bank
http://www.brownells.com/rifle-parts/sights/sight-sets/ar-15-m16-mbus-gen-2-sight-system-prod44044.aspx

Vortex Strikefire (1st gen) at pallmetto for $119.00 is hard to beat.
http://palmettostatearmory.com/index.php/catalog/product/view/id/663/category/188/

He can't run regular mbus sights on railed gas blocks. He'd have to use the Pros

I was pretty sure about that.  Magpul plastic is tough but not that tough.  I do like the Magpul Pro units, but at that price there are a few different options.  Troy, Midwest Industries, ?

One thing I forgot, the Magpul stock set came as a Matrix branded painted set.  Stock, handguard, grip, forward grip, magazine.  LGS had two sets in the dark metallic grey snakeskin looking pattern for $70 a set.  I figure if I don't like the paint I can just repaint them.  From a foot away it looks pretty nice.  We'll have to see how they look assembled.  The weekend of the 18/19 is assembly and test.  I have all the tools...

Went with front and rear Magpul Pros for now.  Vortex Strikefire yet to come...

Change in direction on optics.  Daughter likes the reflex red dots, so a Primary Arms reflex sight not a Vortex.  Going to keep it light.

Woohoo!  Complete success!  My first AR, my first build!  I think I shot an AR once about 20 years ago.  

I wanted to get first noise from this rifle today.  I was on a 2 hour drive back from an errand that took me right by a really nice range so I put the rifle in the car just in case I had the time.  

Function tests worked great with snap caps.  

One round in the mag, bang, bolt locks back.  I held it away from my face, so nothing on the paper at 50 yards.

Two rounds in the mag, , bang bang, perfect function.  Also held away from my face, so nothing on the paper.

Five rounds in the mag, five rounds on paper at 50 yards standing offhand!  No boresight or laser in the bore!  I love it!!!  This was Magpul MBUS Pro straight out of the box and right on the rifle.  It's a setscrew gas block, I put an AL bar on top of the gas block and one on the upper rail and eyeballed them coincident.  First time I've ever set up any kind of iron sights.

Ten rounds in the mag,eight more holes in the paper.

Last twelve rounds, ten more holes.  

No misfeeds, malfunctions, no issues of any kind.  

I failed to bring any target stand with me so the paper was just a loose 8.5x11 hanging from one corner from a nail sticking down from the (baffles? sand filled wooden walls above the target zone)  Some of the misses might have been from the wind blowing it. I'm stoked that most of the rounds were on paper!  I've never been super confident with iron sights before this.  

Future plans for this rifle are a light, a red dot (might not be the PA reflex, do they all have automatic brightness?  need to research that), and lots of range time.  Maybe a carbine class this fall.  

Parts on the way for the twin to this one, only difference is 300blk.  Going to need to crank up the reloading gear after I get a pile of once fired brass in the basement.

Picked up the rest of the parts for the 300 Blackout carbine today at the lgs.  16" Anderson M4 pattern barrel, bcg, ch, delta ring kit, front hg washer.  Small box, but about 2/3 of the cost.