Sig Sauer

The AmbGun family standard
Sig has an ambi and ergonomic manual thumb safety...
...but the Sig manual thumb safety dings the trigger a bit.
DeSantis Slim Tuk Holster Sig Sauer P365
Alien Gear Roswell (formerly WarCat) Tactical Holsters. Optional Red Dot Garage. 
AmbGun Recommends the Alien Gear Roswell Holsters (formerly WarCat)
My favorite holster for the P365, especially when running a red dot on the XL. Nifty red dot garage.

"...molded polymer 20% lighter, 40% tougher and 80% more heat resistant than" Kydex.

Alien Gear Roswell (formerly WarCat) Tactical Holster
The Ambidextral Gunfighter perspective on the Sig Sauer 365 and Springfield Armory Hellcat. Battle of the micro 9mm's. Rounds per Size & Weight Spreadsheet Springfield Armory Hellcat Series  Sentry Solutions Tuf Glide Bullseyes Don't Shoot Back Glock 9mm Dummy Rounds 
Shield Sights are made in the UK. Excellent quality, with the features you need, and no gain of function collusion with PRC.

Without a doubt the best training aid for pistols (and beneficial for rifles, too) MantisX

Because gun shot trauma all require the same emergency response whether from 22LR, 9mm, or 45ACP.