League Sub-Roles: Sub-Roles for the Marksman Category
Snipers
Long ranged DPS that rely on crowd control or gated yet decent mobility to pick off enemies. These ADCs are often more reliant on their abilities for overall effectiveness rather than being pure DPS cannons.
Gunslingers
Shorter ranged DPS that usually rely on quick bursts of damage usually lasting within a few seconds to decimate a target. Fairly mobile and packing very light to moderate crowd control (or not, more damage then), these guys are usually extremely scary in a duel. Their abilities often provide them with the means to survive and thrive in fights, but their basic attacks can still deal some serious damage.
Shredders
Absolute DPS cannons, these guys are all about shredding through the enemy team's health bars as if it was cheese and their basic attacks the grater. Their abilities are often the back up in case things don't go as planned, although some are completely defined by their abilities and the AoE damage or utility they provide. No matter what way, these characters are almost always going to be a huge reason for their team's victory when ahead.
Riot currently doesn't have sub-categories for Marksman so I decided to make some based on the champions. Some of them can fit into multiple (like how Vayne is both a Gunslinger and Shredder and Ezreal is somewhat of a Sniper and Gunslinger), but these are in general pretty good categories to fit them in.