If you begin the game in LL during 1.0 you would have been sent early on to the MSK guild, where they hand you a gun for target practice, but someone notices the way you pose is similar to the way a certain Roegadyn held his in the into movie, and grows suspicious, taking the gun away quickly, saying you are not authorized.

Also in 2.0, on the right hand side of the tower's main floor are desks for the MSK guild, and an npc arguing with a city guard "Yellowjacket", that she didn't see why she needed a gun permit before using a gun.

Also Live Letter IX Yoshida said due to the guild already being established, he plans it to be one of the first new classes added.