This is a kit that I recommend for taking to a pistol class. These items will ensure that you can focus on the learning experience instead of on failing gear.
See Infrared with an iPhone? FLIR One
Tactical Shit tours RMA while picking up plates for LEO's
Wil-Tec muzzle brakes
Inforce APL Gen 3 400 Lumen Weapon Light Review
Fostech Echo Accuracy (Controlled Pairs)