Whether or not you're looking for a dedicated left-hand pistol-caliber carbine or just want a gun you can use effectively and fully either left- or right-handed in any scenario, this KE Arms KE-9 Stripped Lower Receiver is set up exactly the way you need it to be. That's because this lower receiver isn't actually stripped, per se. It comes with a complete ambidextrous magazine catch assembly, so you can have this gun both ways. Each KE Arms KE-9 Lower Receiver is machined at the company's facility from 7075 billet aluminum. The company holds its receivers to tight tolerances within military specifications, so all mil-spec components will function in this lower, and the receiver is compatible with all mil-spec 9mm upper receivers. To enhance its durability, the receiver is treated with an all-black, Class 2 hard-anodized finish. With the KE Arms KE-9 Lower Receiver, you'll get an ejector with your stripped unit. This lower does not feature last-round bolt hold-open, unless you have a linkage system incorporated into your upper receiver. The company warns users that you can use the standard bolt catch to manually lock the bolt to the rear, but the Glock®magazine followers will not actuate the catch. Some 9mm upper receivers will include this linkage.