The Urban edition is the lightest slide we do. It has three windows and is our fastest and flattest tracking slide. *Slide Serration count will change due to length of slide. **Please note if you plan on running suppressor height sights, you will need a custom set. For more information please contact us** The M&P Slide Package will come with a custom set of Dawson Precision Sights, Titanium Screws for the Battle Plate and a custom Agency “A” Slide Back plate. (All slide work is completed on a customer supplied Slide)