Darrell Harris, 17, went to a Bronx park for a water gun fight on Tuesday night. Witnesses say a participant pulled out a real gun and shot him dead during an argument — no arrests have been made.

It started like any normal magnet fishing day... until I pulled up a case of sniper rifle rounds. Things escalated fast.

Darrell Harris, 17, was blasted in the head during a fight that erupted when another boy doused him with water from a gel-pellet gun in Starlight Park around 8 p.m. as a heat wave sent Big Apple ...