Kottonmouth Kings, Swollen Members, Battle Axe Warriors, Big B and Short Dawg will rock the night with psychedelic hip-hop and punk rock at 8 p.m. Friday, July 31, at the Medford Armory, 1701 S. Pacific Highway, Medford. Tickets are $25 in advance, $28 at the door and are available at Bad Ass Coffee and 619 Clothing in Medford, Treasure Trove in Grants Pass and Music Coop in Ashland. Online tickets are available at Ticketweb.com. Doors open at 7 p.m. Call 530-898-1497.