Zaffiri Precision UPK, Complete Upper Parts Kit, Fits GLOCK 17 Gen 4, Black UPK-G17G4Upper Parts Kit (UPK) for Glock 17 - Gen 4. These are great for completing your custom slide. All parts are from US manufacturer. All Parts are made to the highest tolerance to the original specification. These parts are Gen 4 specific and not compatible with any other Gens.Upper Parts KitFor GLOCK 17 Gen 4SpecificationsBrandZaffiri Precision
