Zaffiri Precision Complete Upper Parts Kit Features The Zaffiri Precision Complete Upper Parts Kit is built specifically for the Glock 19 Gen4 giving builders a matched set of internal components sized and finished to Zaffiri s exacting standards. Because the kit is purpose built for this exact generation and model every part is designed to drop into a Gen4 slide without the fitment guesswork that comes with generic aftermarket parts. Zaffiri Precision has built its reputation on tight tolerance machining for the Glock platform and that same attention to detail carries through to this complete kit. Assembling a slide from a matched kit rather than individual parts reduces the risk of mismatched spring weights or incompatible small parts causing reliability issues. Builders upgrading a Glock 19 Gen4 slide benefit from having every necessary internal component included in one package rather than hunting down firing pins extractors springs and channel liners separately. This kit is a practical option for anyone refinishing a slide building a parts kit gun or simply replacing worn internals with fresh precision made components. Because Zaffiri Precision designs around the Glock platform specifically the fit and function match what Glock 19 Gen4 owners expect from their pistol. This complete upper parts kit is a straightforward way to finish or refresh a Glock 19 Gen4 build. Zaffiri Precision Complete Upper Parts Kit Specifications Manufacturer: Zaffiri Precision Model: Complete Upper Parts Kit Compatible Hosts: Glock 19 Gen4 Available At: GrabAGun