AR:K ST Upgrade kit With Apex2 Ready Barrel Bolts improves reliability and increases the

improves reliability and increases the battery life of your gun

Fits (among others)

Notice the super soft/rounded edges of the paddles

Inner Barrel: ~330mm

Machined from Aircraft Grade Aluminum

AR:K ST Upgrade kit With Apex2 Ready Barrel Bolts improves reliability and increases theThis 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!