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The KAK Industry AR-15 Lower Parts Basic Build Kit covers all the little pieces that make an AR-15 lower actually work. Think of it as the connective tissue of your build: the magazine release, bolt catch, safety selector, takedown and pivot pins, buffer retainer, and every spring and detent that holds it together. What it leaves out is the hammer and trigger, and that is by design. If you already have a favorite trigger picked out or want to run an aftermarket unit, this kit gets you everything else without paying for parts you plan to swap anyway.
Everything here is mil-spec, which is exactly what you want in the small parts. These components follow standard dimensions, so they play nice with the vast majority of mil-spec AR-15 lowers whether you are finishing a stripped receiver or restocking your bench for the next project. The detents and springs are the pieces that walk off and disappear during a build, and having a fresh, correctly-sized set on hand saves a lot of headaches.
You get the mil-spec magazine release with its spring and button, hammer and trigger springs, hammer and trigger pins, the full bolt catch group with plunger and roll pin, buffer retainer and spring, pivot pin with spring and detent, takedown pin with spring and detent, safety selector with spring and detent, and a disconnector spring. It is the complete supporting cast minus the two star players you get to choose.
KAK Industry has been turning out American-made components since 2011, and their reputation with builders comes from parts that fit right and hold spec. For a first-time build or your tenth, this is a clean, no-nonsense way to source the small stuff. Pair it with the fire control group of your choice and a grip, and you are ready to finish the lower.
No, the hammer and trigger are left out intentionally. This kit is built for people who want to run their own fire control group, whether that is a mil-spec set or an aftermarket trigger. You get every other small part needed to finish the lower, so you only add the trigger of your choice.
The components are mil-spec, so they fit the large majority of standard AR-15 lowers on the market. As with any build, it is worth confirming your specific receiver is cut to mil-spec dimensions, since billet or proprietary designs can occasionally differ. For a standard forged or billet mil-spec lower, these parts drop right in.
Beyond this kit, you will need a hammer and trigger (or a complete fire control group), a pistol grip, and a stock or buffer assembly with a buffer tube, spring, and buffer. Basic tools like roll pin punches, a small hammer, and a vise block make the install a lot smoother. Once those are on hand, this kit covers the rest of the internal small parts.
It works well for first-timers and experienced builders alike. KAK Industry has a strong reputation for parts that hold spec and fit correctly, which matters a lot with the tiny detents and springs that give people trouble. Just take your time with spring orientation and function-check everything before range use.
| UPC | 811163035811 |
|---|---|
| Manufacturer | |
| Manufacturer Part Number | AR15-LP-KT-02 |
| Model | |
| Product Type | Lower Parts Kit |
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