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The KAK Industry KF-15 Complete Lower Receiver takes most of the fiddly assembly work off your plate. The receiver is machined from USA-produced 7075-T6 forged aluminum and comes finished in a Type III Class II hard-coat anodized deep matte black, so you're starting your build with a proven, corrosion-resistant foundation instead of a bag of loose parts and a punch set. It arrives complete with the lower parts kit installed and an A2 grip in place, ready for you to drop in an upper and figure out the back end.
This one ships without a stock or buffer assembly, which is the whole point. You pick the tube, brace, or stock that fits how you plan to run the gun rather than paying for one you'll swap out anyway. The receiver is threaded for an upper receiver tensioning screw, letting you snug up the fit between upper and lower for a tighter feel with no wobble. It's chambered around a Multi caliber marking and accepts all mil-spec sized lower components, so 5.56, .223, .300 Blackout and similar builds are all fair game.
Small touches add up here. The flared magwell speeds up reloads and guides mags in cleaner, the M16-style fire control group pocket plays nice with mil-spec and most aftermarket triggers, and pictogram selector markings sit on both sides of the receiver for clear, ambidextrous-friendly reference. Builders consistently call out the fit and finish on KAK lowers, with even the forging marks sanded smooth, and note tight, reliable fitment against uppers from a range of makers.
If you want a genuine head start on an AR-15 project without giving up control over the stock and upper, the KF-15 complete lower is a clean, no-nonsense place to begin.
No, this version ships without a stock, brace, or buffer assembly. That is intentional so you can choose the buffer tube and rear configuration that suits your build. You will need to add a mil-spec buffer tube, buffer, and spring along with your stock or brace of choice.
The KF-15 accepts all mil-spec sized components and mates up with standard AR-15 uppers. Builders report clean fitment against uppers from a range of well-known makers. The threaded tensioning screw also lets you tighten the fit between upper and lower to remove any wobble.
It carries a Multi caliber marking, so it works across common AR-15 chamberings like 5.56 NATO, .223 Remington, and .300 Blackout, among others. Since the caliber is set by your barrel and upper, the lower stays versatile. Just match your magazines to the chosen cartridge.
Not on its own, since it is a lower receiver rather than a full firearm. It comes complete with the lower parts kit and A2 grip installed, so you still need to add a buffer assembly, stock or brace, and a complete upper to finish the rifle. It gives you a big head start compared to building from a stripped lower.
| UPC | 811163036801 |
|---|---|
| Manufacturer | |
| Manufacturer Part Number | 801-0604-002 |
| Product Type | Complete Lower Receiver |
| Model | |
| Color | Black |
| Action | |
| Caliber/Gauge | Multi |
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