The TN handgun carry permit doesn't list guns or the limit.
For a primary:
.45 USPc or .357 S&W 640 or .357 Taurus 617
For backup:
NAA Mini .22 Mag and/or .357 S&W 640 or .380 Sig 232
also:
extra mag/speedloader or two
any number of knives, whatever I feel like carrying at the time
Surefire E2E, with modified belt clip & lanyard
rarely: 16" ASP baton
Today: USPc, extra magazine, NAA Mini, MOD Dieter II, Surefire in purse