Officers were dispatched around 9:00 last night, to the 300 block of West Melvin Avenue.
According to police, a 27 year old woman and 46 year old man went to a home to confront two other people about an unknown problem.
Reportedly, the woman taken into custody pointed a gun at one of the victims.
A struggle took place and the handgun was knocked out of the woman's hand. No shots were fired.
In addition to the gun in the backyard of the home, Oshkosh Police also found brass knuckles on the man and a machete in their vehicle.
Both are being held at the Winnebago County jail.