Prior to competing in a sanctioned Olympic or Bunker trap event, all contestant's guns must be inspected by the judge(s) to ensure they are in compliance with governing body rules. For example, there are limits to the amount of porting that may be used, and the gun must be inspected to ensure it operates properly, etc.
Once the gun passes inspection, a sticker is applied to the stock. Usually each event has its own stickers. Thus, the sentimental value some shooters attach to them.
If I am not mistaken the shooters that compete at that level see their guns as tools, and I have heard many indicate that their favorite guns often show the wear and tear of being a "blue collar" shotgun. There have been references made to the checkering and other finish being just about worn off many of their guns.
I also have heard that many or even most of the shooters at that level see the stickers as badges of honor to have earned the privileged to shoot at those events.
I stand to be corrected, but I was under the impression that when they found Kim's gun the only thing that &issed her off was that the stickers were gone...I'm with John though...I'd shoot the pink gun with stickers and wear a tutu. Cheers-Graham.
Well I assume they are certification stickers as well. Paintballers with 1500 dollar paint guns seem to sticker up their guns as well.
About the only reason I could fathum putting any sticker on a trap gun that I paid a big buck for, would be to cover a blemish.