The S2.5 is an upgraded version of the Syndicate S2 Slide. The S2.5 slide features knurling in the front and rear which extends over the top of the slide. The knurling provides a positive grip regardless of grip location. Slides are machined from 17-4 stainless steel and coated in a matte Diamond Like Carbon (DLC). The patented Agency Optic System (AOS) is included on applicable models (G17A(R) and G19A(R) compatible models) and comes with an Iron Plate installed. This is a stripped slide and does not include any internals. DISCLAIMER: This product is not manufactured, authorized, endorsed,or warranted by GLOCK. GLOCK does not warrant or represent thatthis product is compatible with GLOCK pistols. DISCLAIMER: "GLOCK" is a federally registered trademark ofGLOCK, Inc. and is one of many trademarks owned by GLOCK, Inc. andGLOCK Ges.m.b.H. Neither Agency Arms LLC nor this site areaffiliated in any manner with, or otherwise endorsed by, GLOCK, Inc. orGLOCK Ges.m.b.H. The use of "GLOCK" on this page is merely toadvertise the sale of GLOCK pistols, parts, or components. Foradditional genuine GLOCK, Inc. and GLOCK Ges.m.b.H products andparts visit www.glock.com.