Angstadt Arms is a small arms manufacturer located in Charlotte, NC. Mostly specialized in compact, lightweight personal defense weapons (PDW) for civilians and law enforcement. Producers of the lightest and strongest GLOCK fed 9mm AR-15AR-15The AR-15 is nominally chambered in .223/5.56mm NATO, but many variants have been produced in different calibers such as .22-LR, 7.62×39mm, 9×19mm Parabellum and shotgun calibers.https://en.wikipedia.org › wiki › AR-15_style_rifleAR-15 style rifle - Wikipedia.