Zaffiri Precision Upper Parts Kit For Glock 17/34 Gen 5 - 17.5.UPK

Upper Parts Kit for Glock 17/17L/34 Gen 5A complete upper parts kit engineered to finish custom Gen 5 slides with factory-fit reliability. All components are manufactured in the United States to tight tolerances and original specification dimensions to ensure consistent fit and function in Glock 17 17L and 34 Gen 5 slides. This Gen 5 specific kit is not compatible with earlier Glock generations.The kit includes a firing pin spring, firing pin spacer sleeve, two spring cups, nitride firing pin sa