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There is a reason builders keep spare parts within arm's reach. The tiny springs, detents, and pins that live inside an AR-15 lower are notorious for pinging across the shop or disappearing into carpet the second they're under tension. The One Horse AR-15 Oh-Shyt Kit exists to solve that exact headache, giving you a stash of the small components that go missing most often during a build or a teardown.
This is a small-parts replacement set built around the pieces that cause the most grief. Think takedown and pivot pin detents and their springs, safety selector detent and spring, buffer retainer and its spring, and the bolt catch hardware. These are the parts that fly, roll, and hide, and they're the ones a lower parts kit never seems to give you a backup of. Everything is sized for standard mil-spec AR-15 lower receivers, so it drops right in without fuss.
One launched detent spring can stop a build cold, especially on a weekend when nothing is open. Tossing this kit in a toolbox or range bag means a lost part turns into a two-minute fix instead of a canceled range trip. It's the kind of cheap insurance every AR owner appreciates the first time they need it, whether you're assembling a fresh stripped lower or just chasing down a part that decided to make a run for it.
One Horse builds a range of AR-15 components, from barrels and buffer tube kits to complete lower parts kits, so this spare kit fits right into their lineup of practical, build-focused gear. It pairs naturally with any lower assembly job and rounds out a well-stocked bench.
It covers the small, easy-to-lose parts that live in an AR-15 lower, like takedown and pivot pin detents and springs, the safety selector detent and spring, the buffer retainer and spring, and bolt catch hardware. These are the components that tend to launch across the room or vanish during assembly. Having spares on hand keeps a lost part from turning into a stalled build.
The parts are sized for standard mil-spec AR-15 lower receivers, so they drop into most builds without modification. If you're working on an AR-10 or a proprietary platform, double-check dimensions before installing since some of those pins and detents differ.
A basic AR-15 build takes just a few common tools, and a punch set plus a pivot pin detent installation tool makes the job far less frustrating. The detents and springs go in under tension, so a helper tool keeps them from launching. None of it is required, but it saves a lot of time and swearing.
Absolutely. These parts are the first things to go missing during cleaning or a teardown at the range, and they're rarely something you can grab at the corner store. Keeping a kit in your range bag or toolbox means a dropped detent is a quick fix instead of a ruined afternoon.
| UPC | 850078799388 |
|---|---|
| Manufacturer | |
| Manufacturer Part Number | OHOS01 |
| Color | SPARE PART KIT |
| Shipping Weight | 0.046 |
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