The incident took place about 3:10 a.m. at a 7/11 store in the 3100 block of South Tyler Street.
The men displayed a gun after entering the store and demanded cash from the clerk. They stole money, cigarettes and scratch tickets before fleeing.
One suspect is described as a Pacific Islander in his 20s, 5-feet-11 with a heavy build and black hair. He was wearing black shorts, a red T-shirt, black sandals and a black-and-white hooded sweatshirt with a red bandana over his face.
The other was a teenage Pacific Islander, 5-feet-6 with a medium build and short black hair. He was wearing gray pants, a white T-shirt and a red bandana over his face.
Tacoma-Pierce County Crimestoppers is offering up to a $1,000 reward for information leading to the arrest and charging of the suspects.
Anonymous tips can be made at 253-591-5959.