Just ordered a 20" lightweight/pencil profile barrel (5.56X45 chamber and nitride coating in/out). 0.625" low profile gas block, nitride coated/finished rifle length gas tube and roll pin.
Already had the uppers and upper parts kits in the shed.
Same for the lowers and lower parts kit.
This one will get an M16A1 butt stock (fixed old short stock for all you guys addicted to the latest/greatest carbine stocks). I got three of them in a pretty good deal a few years back and I have that one left.
Oh, just realized the carbine buffer tubes/springs/buffers I have won't work. I'll have to order the rifle parts for this one.
Once I get the barrel/gas block and get some measurements I'll be looking at free float tubes to see what looks like it will work for me (I like those Luth AR triangular looking tubes and have two of them, but I'll look at others, too.
Then the Magpul back up sights, a scope and scope mount.
Ordered a small bucket load of 10 round magazines, too. If they don't become necessary next year then I'll hand them out to the boys for bench magazines as the 30 round versions are a little tricky when shooting off a bench.
Pictures once I get it started and again in it's finished/experimental form.