The EXA Slide features aggressive top serrations, an enlarged top window for C-Port barrels, and side windows (L & R). Slide serration count will change due to the length of the slide (ALL SLIDE WORK IS COMPLETED ON A CUSTOMER SUPPLIED SLIDE). If the Agency Optic System is selected, the slide will come equipped with an AOS Iron Plate. AOS Optic Plates are SOLD SEPARATELY.