Muzzle Blasts is the official publication of the National Muzzle Loading Rifle Association (NMLRA). They pay for “articles that deal with muzzleloading firearms or firearms with historical value, for good instructive or how-to, and similar articles.” They want all the submissions to be accompanied by photographs and/ or diagrams. They pay $100 to $300 for product reviews, $50 to $150 for columns, and $100 to $400 for feature articles. To learn more, read their writer’s guidelines.