Loadout Combat Lab is a free online platform for planning tactical equipment and comparing prices across more than 575 retailers. Operated by Lightning Command Lines LLC, it helps users assemble detailed combat loadouts, check product compatibility, and find pricing for firearms parts, armor, optics, tactical gear, and emergency medical equipment. Its database includes hundreds of thousands of parts and is updated daily.

The Loadout Editor supports full-kit planning across categories such as armor, belts, weapons, medical supplies, communications, and carry equipment, with weight, cost, and compatibility tracked by slot. The Weapon Builder focuses on individual platforms, including AR-15, Glock, P320, AK-47, shotguns, and hunting rifles. Users can also explore product listings, builds, deals, trends, benchmarks, and guides, or start from scenarios such as hunting, home defense, range training, duty patrol, and backcountry travel.

The service is funded through affiliate commissions from participating retailers. It states that compensation does not affect displayed products, prices, or their order, and that it is not affiliated with manufacturers.