High end Pistol Caliber features, at a fantastic price FM Product Pistols have features not commonly found in Pistol Caliber AR-type Pistols of this price point. From the patented, reliable bolt hold open mechanism to the included MLOK rail covers and blast diffuser, the FM-9B Enhanced Pistols are unmatched. The Pistol Buffer Tube is capped by a sturdy MFT Brace, making firing while braced against your forearm much more comfortable. The billet lower accepts standard 9mm Glock magazines and also includes an MFT Pistol Grip with large beavertail. MLOK forend allows for a variety of attachments and rail covers. The upper receiver and handguard are seamlessly mated, so that a continuous Picatinny interface is available on the top for attachment of Optics. The Blast Diffuser mounted to the muzzle projects concussion forward and away from the shooter, for a more pleasant shooting experience.