Flashbang

Flashbang
 Stunning arcing splash projectile type
 25 damage
  2 m splash radius
 5 m range
 0.35 seconds buffer
 Lasts 0.8 seconds
 10-second cooldown
 ✘ Cannot headshot
 ✘ Cannot inflict self damage
McCree heaves a blinding grenade that explodes shortly after it leaves his hand. The blast staggers enemies in a small radius.
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Details

McCree throws a grenade that does a flat amount of 25 damage and stuns enemies for 0.8 seconds, interrupting whatever ability they were using. The grenade explodes regardless of whether or not it made contact with anything. After throwing the grenade, McCree has a 0.35 second delay before he can use alternate fire again.

Flashbang can also stun turrets such as Sentry Turret or Deploy Turret, temporarily halting their attack.

Trivia

• The Flashbang is a non-lethal grenade once employed by Overwatch.
• The flashbang can stun Torbjorn turrets and oddly enough Junkrat´s steel traps.

Patch changes

September 24, 2020 Patch: Stun duration increased from 0.7 to 0.8 seconds.  July 27, 2017 Patch: Stunned targets are now slowed heavily, meaning they're less likely to escape while stunned (especially while in the air).  March 21, 2017 Patch: McCree no longer receives credit toward his on-fire meter when his Flashbang is used against Mei’s Ice Wall.  July 26, 2016 Patch: Recovery time (i.e. the amount of time before McCree can fire again) decreased from 0.5 seconds to 0.35 seconds.  April 13, 2016 (beta) Patch: Stun duration increased by 0.2 seconds, Recovery time (i.e. the time before McCree can shoot again) increased by 0.2 seconds