According to investigators, deputies were initially called to the home in the 13600 block of Reeveston Road for a disturbance between a boyfriend and girlfriend.
When deputies arrived, they found the man armed with an AK-47.
The man was ordered to drop the gun, but instead, he pointed the weapon at a deputy, officials said. That deputy shot the suspect.
Investigators believe the man came to the party to confront a woman.
The deputy is OK, according to the Harris County Sheriff's Office.
Deputies said the male suspect was taken to a local hospital. His condition is currently unknown.