This can be very confusing to players because it will serve as a false alarm, as though a nearby enemy is shooting at them.
Hitting objects such as walls should all have distinct sounds. Especially if it is going to be dirt, grass, concrete, metal, and ceramic. All of them should sound either like a blunt thud, a whack, a whip, a crack, or the sound of things splintering. Not a "pew" haha. I guarantee you can hit any object an it will all sound like a bullet shot.