The PX4 features innovative locked breech with rotating barrel system, thelight yet durable frame employs modern thermoplastic technology through theuse of techno-polymer reinforced fiberglass, modular grip system, manualsafety and standard picatinny rail. SPECIFICATIONS:Mfg Item Num: JXF4F21 Action :Single/DoubleCaliber :40 Smith & WessonBarrel Length :4"Capacity :14 + 1Safety :ManualGrips :PolymerSights :3-DotWeight :27.7 ozFinish :Black