Darin's Gun Exchange, DXG Paintball 950 Randolph St, Napa, CA94559 Darin's offers a full line of paintball equipment, including clothing and accessories. In terms of guns and shotguns,…More Darin's carries all major brands of firearms, ammo and accessories. Also available are shot and shells for self-loading. Safes and other gun safety equipment are also for sale. Darin's is conveniently located in downtown Napa.