His trench coat is made of the same material from John wick 2
Weapons
It's essentially a very big semiautomatic pistol, with a length of 39cm. It's chambered for the mighty .454 Casull round, which finds use primarily in hunting large game, such as deer and bears
Katana
Kusarigama, kept under his hoodie as a last resort
Equipment
armor penetration rounds
His cellphone (only if there is a way to charge it)
Smoke granades and flash bangs
Grenades