Well, my new barrel arrived today. It's a post ban M4 Dissipator. I am going out of town so I won't be able to install it until Sunday [>Q]
I'm putting together a cheap, lightweight blaster. I used a stripped Oly lower, DPMS lower parts kit, DPMS bolt and carrier, a very old A1 upper that was given to me, surplus A1 stock and triangle handguards, and the new barrel.
I ordered it a little over six months ago, and was told before Christmas that it probably wouldn't be in stock for some time. But now it's here so I gotta go get some ammo.