Special Purpose sniper rifles

Special Purpose sniper rifles may be, in turn, splitted into 2 sub-categories:

1. Large caiber sniper rifles usually built to use heavy machineguns ammunition, such as .50BMG (12.7x99mm) or 12.7x108mm. Effective range of such rifles is up to 1500 meters and above, depending on size of target and quality of the ammunition. General purpose machinegun ammo usually produced not-too-good accuracy, but recently some special "sniper" rounds developed in .50BMG caliber.
                                   
2. Silenced sniper rifles usually are used with special sub-sonic ammunition and removable or integral silencers to produce lower sound report. Sub-sonic ammo decreases effective range down to 300-400 meters, but it's worth. With the correct ammo and silencer, the sound of the gunshot could be easily mised completely at the distances of 100-200 meters at night, or even at 30-50 meters - in daily urban noize.