Freedom Ordnance FX-9 4.5" 9mm AR style pistol uses Glock style magazines. The pistol has an enhanced extractor and bolt package. Features a Billet receiver 1" shorter than standard AR-15, 3.5" Freedom M-Lok free float handguard, handstop (designed for the FX9P4), last round bolt hold open, AR-15 style oversize Recurve charging handle and anti walk pins. This pistol is compatible with 9mm approved 1/2"x28 TPI muzzle devices and suppressors. Includes ETS 31rd Glock style magazine. Made in the USA.