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This is Ruger's factory lower parts kit (item #91002), the tidy little box that turns a bare stripped lower into a working one. It pairs a standard GI-style single-stage trigger group with a classic A2 pistol grip, plus all the small springs, detents, and pins that always seem to be the ones you're missing halfway through a build. If you've ever tried to source a bolt catch spring or a takedown detent on its own, you already know why grabbing a complete kit saves you a headache.
Inside you get the fire control group (trigger, hammer, and disconnector with their springs and pins), a safety selector with its spring and detent, the bolt catch with roll pin and spring, the magazine catch assembly, front pivot pin, rear takedown pin, trigger guard, and the buffer retainer with its spring. The A2 grip includes the grip screw and lock washer. It's the whole lower's worth of small parts in one shot.
The GI-style trigger is the tried-and-true AR fire control setup. It's not a fancy match trigger, and that's the point here, it's reliable, easy to install, and does exactly what a defensive or range-duty rifle needs. The A2 grip is the traditional AR feel a lot of folks grew up shooting, with the checkered texture and finger swell that has been on service rifles for decades. Coming straight from Ruger means the fit and finish match what you'd expect on their factory guns.
The Ruger AR-556 lower is a standard-pattern AR-15 receiver, so this kit drops into it as well as into most other mil-spec AR-15 lowers. If you're refreshing a well-used rifle, completing a stripped lower, or just keeping spare small parts on the bench, this covers the fiddly stuff in one purchase. Pair it with a stripped lower, a buffer tube assembly, and a stock and you're on your way to a complete lower.
Yes. The Ruger AR-556 uses a standard-pattern AR-15 receiver, and this kit is built to that same spec. It will drop into most mil-spec AR-15 lowers, though as with any build you may run into occasional tolerance differences between brands that call for light fitting.
It's a standard GI-style single-stage trigger, the same basic fire control design that has run in AR rifles for decades. It's not a match or drop-in unit, so it's a great choice for a reliable range or defensive build rather than precision competition. If you want a lighter, crisper pull, you can always swap in an upgraded trigger later.
No. This covers the small internal parts, the trigger group, and the A2 grip only. You'll still need a stripped lower receiver, a buffer tube assembly, and a stock to end up with a complete lower.
Yes, it's Ruger factory item #91002, so the parts match the fit and finish you'd find on their production guns. That's a nice advantage if you're completing or repairing a Ruger AR-556 and want components that came from the same source.
| UPC | 736676910021 |
|---|---|
| Manufacturer | |
| Manufacturer Part Number | 91002 |
| Color | AR15 LOWER PARTS KIT |
| Model | |
| Product Type | Lower Parts Kit |
| Shipping Weight | 0.66 |
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