Re: BF1 Pilot Rank 10 Weapon unlock

mwaldier is right - to get the sawed-off shotgun, you need 10 service stars both as pilot and tanker. Until then, the only opportunity to use sawed-off shotgun is picking up the Tank Hunter kit (sawed-off shotgun is the secondary weapon in it).

Also, there is no progress between 10th and 11th service stars, because there is no 11th service star - their number ends at 10.