Discount Gun Sales 12700 NE 124th St, Kirkland, WA98034 Discount Gun Sales sells both new and used firearms. Go in person to the store or browse the inventory online, there are…More plenty brands and sizes to choose from. Make sure to check the FAQs page online for all the information needed in order to purchase a firearm. You must be of legal age and pass a background check before a purchase can be made. Trade-ins and consignments are also available.