I have had good luck with Faxon barrels.
http://faxonfirearms.com/barrels/ar-15/5-56-nato-223-remington/
They have several .223 barrels for less than $200.
So you need Remington part number F405345? The black synthetic stock with the over molded rubber? If that's the one, looks like Brownells has them in stock if you don't find a take off somewhere.
Brandon, would the stock you have work with either of the cast plates for the Versamax? Looks like there are two different ones available.
http://www.gunpartscorp.com/Manufacturers/Shotguns-37896/VersaMax-42892.htm?page=3
Good shooting with you last weekend at the Vortex match!
18" Black Hole Weaponry Special Purpose Rifle barrel for sale. This barrel is new, unfired, never mounted. Picked it up off the prize table at the 3Gun Nation Southwest regional last year. Its a 1-8 twist, marked 5.56 (.223 Wylde).
Price reduced to $205.00 shipped.
Thanks for looking.
Brian