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Geissele built its name on triggers, but the company puts the same fit-and-finish obsession into the small parts too. The Ultra Duty Mag Release Button is a direct upgrade over the plain aluminum button that ships on most AR-15 and LR-308 lowers. The big difference is the aggressive checkered texturing across the face, which gives your trigger finger something to bite into when you slap the release. If you have ever had a wet, sweaty, or gloved hand slide right off a smooth mil-spec button during a reload, this fixes that in a hurry.
The checkering is the whole point here. Under range conditions or hard training, water, sweat, or grit can turn a slick factory button into a frustration. The cuts on this one are sharp enough that your finger won't slip, which makes for a more positive, repeatable mag drop. It's a small part that punches above its size once you actually run it.
This button is machined from stainless steel rather than the softer aluminum found on standard components, so it holds up better to years of thumbing and duty use. The corrosion resistant black finish keeps it looking sharp and shrugs off the elements. The texture pattern is designed to match Geissele's Maritime Bolt Catch, so if you're building out a coordinated lower with the checkered takedown pins and bolt catch, this ties the whole set together visually.
Installation is straightforward for anyone who has been inside an AR lower. It fits the same magazine catch and spring as a mil-spec button, so it threads onto your existing catch assembly with no special tools or modifications. This same button is the one Geissele uses in its Super Duty and Ultra Duty Lower Parts Kits, so you're getting a factory-grade component for a targeted upgrade. For builders who want to spec out every piece of a rifle, it's an easy win that improves both feel and looks.
Yes. It fits the same magazine catch and spring as a factory mil-spec button, so it threads onto your existing catch assembly with no modifications. Anyone comfortable working inside an AR lower can swap it in a few minutes with basic tools.
It's designed for AR-15 and LR-308 style lowers that use standard magazine catch dimensions. Since it swaps directly for a mil-spec button, it works across the vast majority of AR-pattern lowers built to spec.
The aggressive checkering gives your finger a positive bite even when your hands are wet, sweaty, or gloved. On a smooth factory button, your finger can slide off during a fast reload, and this pattern eliminates that. It's a small change that makes mag drops feel more consistent.
It does. The texture is designed to match the Geissele Maritime Bolt Catch and coordinates with the checkered takedown pin set, so building out a matched lower gives your rifle a clean, unified look. This same button is used in the Super Duty and Ultra Duty Lower Parts Kits.
| UPC | 817953026946 |
|---|---|
| Manufacturer | |
| Manufacturer Part Number | 05-3634 |
| Color | MAG RELEASE BUTTON |
| Length | 4.0500 |
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