Mendosa's Gun-runners

When Quinn Mendosa's gun-runners steal fifty crates of rifles from Fort Stirling, Sheriff Rourke Bowman reckons that plenty of trouble will be heading his way. But that trouble arrives sooner than he expects when his jailbird brother Dave Bowman rides into town and raises hell. Rourke has enough trouble on his hands, but when Dave offers to help him capture Mendosa by infiltrating his gun-runners it's an offer that's just too good to refuse. Can the unreliable Dave complete his mission before those rifles fulfil their deadly purpose? Or will Rourke live to regret not running Dave out of town the moment he first clapped eyes on him?