KAK Industry KF-15 Complete Lower Features The KAK Industry KF-15 lower receiver is machined from 7075-T6 aluminum forgings produced in the USA giving it the strength and dimensional consistency serious builders expect from a foundational AR-15 component. The receiver is threaded for an upper receiver tensioning screw which lets a builder eliminate upper-to-lower play for a tighter more precise fit between the two halves of the rifle. Its M4 style fire control group pocket accepts standard mil-spec trigger groups so there is no need to hunt for proprietary parts when it comes time to drop in a trigger. The Type 3 Class II hard coat anodized deep matte black finish is applied for durability standing up to range use weather and handling without flaking or fading over time. Every KF-15 ships with KAK s own lower parts kit and a mil-spec buffer tube and buffer already installed so the receiver arrives ready to mate with a complete upper rather than requiring a separate parts purchase. Pictogram selector markings appear on both sides of the receiver keeping the safe and semi positions clear for shooters regardless of which hand runs the controls. The receiver is designed around Multi-Cal compatibility accepting the broad range of AR-15 components needed whether the build is chambered in 5.56 NATO .300 Blackout or another common AR-15 cartridge. For anyone starting a custom build or upgrading an existing rifle the KF-15 gives a dependable mil-spec foundation at an accessible price point. KAK Industry KF-15 Complete Lower Specifications Manufacturer: KAK Industry Model: KF-15 Type: Complete Lower Receiver Action: Semi-automatic Caliber: Multi Color: Black Finish: Anodized Grips: A2 Grip Material: 7075-T6 Aluminum Safety: Manual Weight: 1 lb Available At: GrabAGun