COHunter, fancy seeing you here too....
Did Midway give you an estimated ship date on the upper?
The reason for the question is OLY halted production last year of alternate caliber barrels because of back log in trying to keep up with demand for standard 5.56/.223 barrels.
Most custom AR gun makes that use OLY barrels also ran out of alternate caliber barrels last year like Mike Milli, Dan Carey and Tony at Del-Ton.
I would contact Midway dirrectly and ask for an ETA for the upper.. you may find out that they can't give you a date and it may be a few years.
Mike Milli for
www.dtechsuperstore.com has 30 cal Shilen blanks and has a 300 Fireball reamer and makes his own AR barrels. He can put the gas port anywhere you want and with any size diameter you want. He does outstanding work and can even turn the barrel down to the profile you want, add weight reduction fluting (Not cosmetic) and thread the barrel for a can or just a flash hider. He pioneered the WSSM platform with Olympic Arms and is the only authorized person to make WSSM AR rifles other than OLY. BTW he has a large selection of WSSM wildcats available too.
Sorry no load data... just sharing info.