The Survivors (1983) on Netflix

Sonny Paluso and Donald Quinelle are two unfortunate people who have just lost their jobs; Sonny's gas station has been blown away and Donald has just been fired by his boss's parrot! But that day, their lives change when they prevent a robber from holding up a bar, and they become heroes. Unfortunately, Jack (the robber) gets away, and when he sees Donald's face on the TV, he decides to go after them. In the meantime, Donald becomes obsessed with guns and leaves for the mountains, where he will learn to survive...