The most recent Fortnite patch, v6.30, activated the mounted turret in-game. With the release of the patch came new skins that were data-mined by players. The skins are expected to be released during week 8 of season 6. Along with the leaked skins are 3 leaked Fortnite gliders. Making it a total of 5 leaked skins, and 3 leaked gliders.
Keep in mind that these leaks have not made their way into the game yet. Thus, the exact prices, release date, and names are all subject to change. However, normally once skins, gliders, and other in-game items are leaked they make it into the game exactly as described majority of the time.