2A Marketplace is a free online classifieds platform created for the American firearms community. Built by gun owners, it offers a place to buy, sell, and trade firearms and related items through direct, peer-to-peer connections. Users can create listings without paying fees or commissions, browse offers, and contact buyers or sellers through private messaging.

The marketplace covers handguns, revolvers, rifles, shotguns, ammunition, accessories, firearm parts, and gunsmith services. Listings may include items such as optics, mounts, slings, barrels, lowers, and triggers. The site also provides category browsing, search tools, account features, and educational articles about private sales and concealed-carry reciprocity across different states.

2A Marketplace emphasizes private commerce and responsible transfers, while noting that users must follow applicable federal, state, and local laws. Its guidance explains that rules vary by location and suggests using a local licensed dealer when appropriate. The site also offers a free firearms bill of sale template to help buyers and sellers document a transaction.