The 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.Features: Lowered ejection port to aid in ejection of brass Match grade, precision milled tolerances that are tighter than factory Improved accuracy and grouping performance upon installationDETAILS Type: Stripped Series/Collection: Z17/Duty Material: 17-4 Stainless Steel Finish: Black Nitride For Use With: Glock 17 Gen 5 Pistol Dimensions: 7-1/4" L x 1" W x 0.84" H Includes: Torx Wrench and (2) Sets of RMR Screws (Tall and Short) Weight: 10.8 oz