About Loadout

Loadout is a free tool that answers a deceptively hard question: which optic actually fits my firearm, and which one makes sense for how I use it? Red dot footprints, adapter plates, mounting standards, and magnification choices trip up even experienced shooters. We turn that guesswork into a clear, verified answer.

What we do

Start with your firearm. We show every optic in our catalog that fits it, and exactly how it mounts — directly, or via which adapter plate or mount. For magnified optics we also flag suitability: whether a given magnification range actually suits your platform's effective range, so you don't over- or under-scope your gun.

How we get it right

Our compatibility data — footprints, mounting interfaces, and the adapters that bridge them — is researched and verified per model, not scraped or guessed. It's the part most sources get wrong, and the part we work hardest to get right. We cover hundreds of popular firearms across pistols, rifles, shotguns, and more, and we're always adding to it.

How we stay free

Loadout is reader-supported. When you buy through a link to one of our retail partners, we may earn a commission at no additional cost to you. That's what keeps the tool free — and it never changes which optics we show you as compatible. See our affiliate disclosure for details.

A note on safety and accuracy

Compatibility and suitability information is provided as general guidance. Always confirm fit for your specific firearm and optic before purchasing, follow the manufacturer's instructions, and observe safe firearm handling and all applicable laws. Some products may be regulated in your state — verify your local laws.