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The Hi-Viz ARN101 replaces the standard front sight post on your AR-15 or M4 with a vertical tritium version that lights up on its own. Tritium is a self-powered glow, meaning there are no batteries to swap and no charging under a flashlight before you head out. That black factory post disappears the second the light gets low, and this sight fixes that with a bright green aiming point you can pick up fast in shadows, at dawn, or well after sunset.
This is a genuine tritium sight, not a fiber optic that only glows when there's light to feed it. The vertical post design gives you a clean, natural sight picture that lines up quick with your rear aperture. It's built to fit most AR and M4 rifles running an A-Frame or folding front sight base, covering both fixed and detachable setups. One thing worth knowing up front: it does not fit Magpul BUIS, so check what you're running before you order.
Installation is straightforward if you've ever adjusted a standard A2 post. The sight ships with its own adjustment tool and a detent, so you've got what you need to pull the old post, drop this one in, and get it zeroed for elevation. Depress the detent, back the old post out, thread the new one in, and adjust to your zero. Most folks knock it out at the bench in a few minutes with the included tool.
Low-light is exactly where this sight shines. Whether you're running a truck gun, a home-defense build, a hunting rifle, or just want irons you can trust when the sun's not cooperating, a glowing front post makes target acquisition faster and less of a guessing game. The steel construction holds up to real use, and since the tritium is sealed and always working, it's the kind of upgrade you set once and forget about.
It fits most AR-15 and M4 rifles that use an A-Frame or folding front sight base, including both fixed and detachable sight configurations. It's a direct swap for the standard A2-style front post. Keep in mind it does not fit Magpul BUIS, so if you're running those, this isn't the sight for you.
No. It uses tritium, which is a self-powered light source that glows on its own without any battery or exposure to a flashlight beforehand. That means your front post is always lit and ready in low-light conditions, no prep required.
If you've ever adjusted a standard A2 front sight post, this will feel familiar. The sight comes with its own adjustment tool and a detent, so you depress the detent, back out the old post, thread the new one in, and adjust for your zero. Most people have it done at the bench in a few minutes.
Yes. It's built from steel for the kind of durability you want on a working rifle, and the tritium element is sealed inside the post. It holds up to recoil and normal handling, so it's a set-it-and-forget-it upgrade you shouldn't have to fuss with.
| UPC | 613485590456 |
|---|---|
| Manufacturer | |
| Manufacturer Part Number | ARN101 |
| Color | GREEN |
| Length | 6.5500 |
| Model | |
| Style | Post |
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