https://www.titleist.se/teamtitleist/team-titleist/f/club-fitting/42971/what-is-it-different-between-n-s-pro-880-amc-and-n-s-pro-modus-3 I went golf pro shop today .. I tried 718 ap2 and 718 ap3 .the head is not much different.. the shaft I like n.s.pro 880 amc stiff shaft light weight.. but when I get home look up eBay just shaft they don’t have much n.s.pro 880 amc they have n.s.proen-USTelligent Community 10https://www.titleist.se/teamtitleist/thread/224666?ContentTypeID=1Tue, 11 Dec 2018 18:45:32 GMT9ab519fc-5311-4952-85cd-0a0ceffb73fb:17365b09-2a7e-41c4-a4e3-ee969dd26851Don OIf you go to Clubs on the Titleist site and check the Custom brochure, the Modus-3 105 is a mid-launch/mid-spin shaft and the 880 AMC is a mid-high spin/high launch shaft on the iron shaft comparison graph. Not a close replacement. Compared to the Pro-850 shafts, the AMC shaft is heavier in the short shafts and lighter in the longer.<div style="clear:both;"></div>