The Taurus PT 92 AF-D is a semi-automatic pistol produced by the Brazilian firearm manufacturer Taurus. It is a variant of the Taurus PT 92 series, which is closely based on the classic Beretta 92 design. The AF-D model specifically refers to a version that features decocking and single-action/double-action (SA/DA) firing modes.
The AF-D part of the name likely refers to the decocker feature, which allows the user to safely decock the pistol without having to pull the trigger. This is useful for safely lowering the hammer when the gun is not in use.