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This is the lower parts kit for folks who don't want to piece their build together part by part. Instead of tossing a bag of mil-spec springs and pins at you, Geissele loads the Ultra Duty LPK with their own upgraded components so your lower ends up smoother, tougher, and better looking than a standard build. It covers everything on the internal side of completing or rebuilding an AR-15 lower receiver, and it comes in the popular Desert Dirt Color finish.
Key components are made from stainless steel, which holds up better against rust and hard use than the usual parts you'd find in a budget kit. That matters when your rifle sees rain, sweat, humidity, or just a lot of rounds downrange. Everything in the kit is machined at Geissele's facility in North Wales, PA, so the fit and finish is consistent from one piece to the next.
The standouts here are the Maritime Bolt Catch with its aggressive texturing and extended paddles, plus the Ambidextrous Super Configurable Safety. That safety lets you swap and reposition the levers to suit lefty or righty shooting, and it gives you a crisp, positive click at safe and fire. Geissele carried the same tank-tread texturing onto the takedown pins and mag release button, so your controls look and feel like a matched set.
Crowning the kit is Geissele's Ultra Precision Trigger Guard, 5-axis machined from a solid block of billet 7075-T6 aluminum with a Type-3 hardcoat anodize. It's enlarged for extra room, which comes in handy if you shoot with gloves on. One thing worth knowing before you order: this version ships without a pistol grip and without a fire control group, so you're free to drop in your favorite trigger and grip. If you're already running a Geissele trigger or plan to add one, this kit is a natural pairing for a clean, cohesive lower.
No, this version does not include a fire control group or trigger. It comes with the Ultra Precision Trigger Guard, but the trigger itself is left out so you can install the trigger of your choice. It pairs especially well with a Geissele trigger if you're building a matched setup.
It does not. The 05-435S is the no-grip configuration, which lets you add whatever grip fits your hand and style. That keeps the kit flexible for builders who already have a grip preference.
Rather than basic parts, you get Geissele's upgraded components like the Maritime Bolt Catch, the ambidextrous Super Configurable Safety, and a billet trigger guard. Key parts are stainless steel for better corrosion resistance and a longer service life. The tank-tread texturing across the controls also gives the finished lower a cohesive, custom look.
Yes, it's designed for standard mil-spec AR-15 lower receivers, so it works for both fresh builds and rebuilds. As with any AR build, it helps to have basic tools like punches and a properly fit vise block. Take your time seating the detents and springs and it goes together cleanly.
| UPC | 817953025321 |
|---|---|
| Manufacturer | |
| Manufacturer Part Number | 05-435S |
| Color | Desert Tan |
| Product Type | Lower Parts Kit |
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