Sleeve gun movie name?

Solved364 views#1 Moviescop highway patrol sleeve gun

In this movie some bad guys are in a highway stealing from a stopped truck or something like that and then a patrol car pulls up and a lone cop walks out and sees this and tries to stop them. He points his gun at the the main bad guy and asks him to raise his hands up. The bad guy does so, slowly, but as he slowly raises his hands up the cop spots a concealed sleeve gun but it’s too late by then and it fires and kills the cop.
I saw this movie in tv when I was a kid so I don’t remember the cast or other details, but judging by the quality of the film, I believe it must one from the late 70s or 80s, maybe max till the mid 90s. So which movie is this? please help me out

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uvavua Selected answer as best Nov 6, 2021