The invention relates to a sight for sporting rifles. The inventive sight consists of: a support (5) comprising a body which surrounds part of the barrel and a head which covers part of the muzzle and which is equipped with a sufficient opening for the through passage of the bullet once fired, the diameter of said head being greater than that of the muzzle; first sliding guides on the outer surface of the aforementioned support (5), which are mounted to first guide elements located on the inner surface of the large muzzle (3); a sliding base (9) for fixing the front sight; second sliding guides on the outer surface of the sliding base (9), which are mounted to second guide elements located on the upper outer part of the support (5); and connecting means which are provided on the sliding base (9) in order to fix a front sight.