After reading good things about them, I ordered five a few months ago when they had their '5 for $50' sale. They have been 100% reliable. Granted, I haven't done any long term testing, only about 500 rounds, but I will order some more.
World's Largest Supplier of Firearm Accessories, Gun Parts and Gunsmithing Tools - BROWNELLS
World's Largest Supplier of Firearm Accessories, Gun Parts and Gunsmithing Tools - BROWNELLS