Houston police were called to the restaurant on Scott Street and Corder just after 9 p.m.
Employees told sister station ABC13 in Houston that a mob of two women, three men, and a baby were told at the drive-thru that the chicken sandwiches were sold out, which apparently triggered the would-be customers.
That's when police said they tried to get inside the restaurant.
One man had a gun, but a restaurant worker was able to lock them out. All the while, the group left the baby inside their vehicle.
"It was more of an aggravated assault because he was displaying a weapon and threatened employees," Houston Police Lieutenant Larry Crowson said.
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No injuries were reported.
Police said the man with the gun is being described as having small dreadlocks, tattoos on his face and was seen wearing a black shirt with red sleeves.The group left in a blue SUV.
Authorities are hoping security cameras captured the incident. Anyone with information is asked to contact Houston police.
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