AR:K ST Upgrade kit With Apex2 Ready Barrel

This upgrade kit turns your standard AR:K into the newer very limited release ST AR:K. These are very limited and won't be around for long as we are the only store in the U.S. to receive these. The barrel is a .691 bore size and is Apex2 ready. The shroud has 4 Picatinny rails on it that can mount a variety of items. Don't let this awesome upgrade slip by!