They provide the ability to accurately fire the weapon provided all other marksmanship principles are followed.
You can get quality gun sights at a local gun store, or at a website that sells these goods. To find quality gun sights, you should check reviews by other people, or ask people you know for suggestions.
The carbon will darken the sights and cut down on reflection/glare.
Look through your iron sights, or plastic sights, or whatever.
Have never seen an ad as you have described- sorry
Aligning front/rear sights
Stock dimensions and sights
Aligning front/rear sights
Have never seen an ad as you have described- sorry
If its a gun. You pull the trigger while aiming down the sights
Gun shops, gun shows, Numrich, Brownell's, MidWay USA, etc..
The aiming device of a gun is called a sight. Mechanical devices are known as iron sights, even if they are made of brass or other metals. Sights using lenses are called optical sights, or, if they provide magnification, telescopic sights. "telescopic sight" is usually shortened to "scope" in informal conversation.
No, the BT omega does not have any rails to mount any sights on. A custom rail would need to be fitted and drilled into the handle to support any sights.