CIA CAOP0003 ONYX XL REDDOT RMR FOOTPRINT

The Century Arms CIA CAOP0003 Onyx XL is a red dot sight built around the industry-standard RMR footprint, making it a versatile optic choice for pistols, rifles, and shotguns that accept Picatinny or direct-mount interfaces. If you're running a modern tactical pistol, a competition gun, or a rifle with RMR-pattern mounting, this compact red dot gives you a clean, intuitive aiming solution without the bulk of traditional iron sights or magnified optics.

The Onyx XL designation signals a larger-format emitter compared to compact variants—that means a brighter, more visible dot in challenging light conditions, from dawn hunting scenarios to indoor ranges where ambient light varies. The RMR footprint itself is the gold standard in compact optics: it's the same mounting pattern used by Trijicon, Holosun, Sig, Leupold, and dozens of aftermarket mount manufacturers, so you're not locked into a single ecosystem if you decide to upgrade or swap it out later.

Century Arms brings practical, no-nonsense engineering to this sight. Whether you're outfitting a home-defense shotgun, a duty gun, or a precision rifle platform that benefits from a lightweight optic, the Onyx XL bridges the gap between simplicity and capability. It's the kind of optic that doesn't demand constant fiddling—just mount it, zero it, and trust it downrange.

Frequently Asked Questions

Is the CIA Onyx XL compatible with my RMR-footprint gun?

Yes. If your firearm has an RMR-pattern mounting interface—whether that's a milled slide on a modern pistol, a Picatinny rail adapter, or a dedicated dovetail mount—the Onyx XL will fit. RMR is the de facto standard for compact optics across pistols and rifles.

What's the difference between the Onyx XL and a standard red dot?

The XL designation refers to a larger emitter, which produces a brighter dot and better visibility in bright sunlight or low-light conditions compared to smaller-format optics. This makes it especially useful for hunting and outdoor shooting where light can vary dramatically.

Can I mount this on a rifle or just a pistol?

The RMR footprint works on rifles, shotguns, and pistols—anywhere you have compatible mounting available. Many rifle users run RMR-pattern optics on ARs, shotguns, and other long guns via Picatinny adapters or direct milling.