Due at contact between barrel and projectile in a shoot of a firearm, there is mark which are left in bullet’s surface. These marks are characteristics of each firearm and further could be interpreted as its “fingerprint”. By recognizing the characteristics which are present in these marks would lead to identify each firearm as effectively as fingerprints allows identify characters. Is presented in the present work, a set of several nature characteristics, which are useful in description of fired bullet’s surface image texture.