The Zev Technologies Duty slides feature the same workmanship and quality that ZEV is known for with a functionally driven design and utilitarian coating for the no-nonsense shooter who is looking to complete a new frame build or to enhance the functionality of their Glock. The black nitride finish provides a durable coating and the patented ZEV RMR cut enables the use of red dot sights using an RMR installation footprint. We've reduced the cost, but not the quality. FeaturesMachined from 17-4 Stainless steel billetLowered ejection port to aid in ejection of brassMatch grade, precision milled tolerances that are tighter than factoryImproved accuracy and grouping performance upon installationTorx wrench and two sets of RMR screws (tall and short) included DISCLAIMER: This product is not manufactured, authorized, endorsed, or warranted by GLOCK. GLOCK does not warrant or represent that this product is compatible with GLOCK pistols.