There are 5 in house.
1. bedroom in trash can.
2. On the sofa next to mulekick.
3. on the kitchen counter behind some flowers.
4. on trash can in bathroom.
5. in the bathtub.
There are 5 more in the yard.
1. in the campfire.
2. on the animal on the shed.
3. on a tree branch in the middle of the yard.
4. in vehicle box
5. in tire by phd
There are 5 more on the street.
1. in the car by juggernog on passenger side.
2. in the trailer next to electric cherry.
3. on the graveyard wall.
4. next to mystery box behind the crates.
5. in the car next to deadshot sitting on a seat.
There are 2 more in the graveyard.
1. on top of pack a punch.
2. in the wheel barrow by tombstone.

once you shot all 17 a message will appear saying. "Buster would be proud" then you can claim your reward in the house by mule kick

Reward is a completely custom revolver.