Around 1.61 kilometers from National Firearms Museum, check out the offers from Enterprise. Whether you’re looking for car rental companies around National Firearms Museum (you’ll find multiple) or another area of Fairfax, Expedia will help you snag an awesome ride at the best price. Our number one tip for getting your hands on a bargain? After entering your details, click on the “Great Deal” filter to see the cheapest cars for each category.