The M99 rifle is offered as anti-materiel / anti-sniper weapon, and is available in two calibers - 12,7x108 (M99-I)and 12,7x99 / .50BMG (M99-II). Chinese standard issue ammunition. This is way below Western "sniping" standards but more or less enough for anti-materiel work or short-range enemy snipers suppression.
Not much information is available on internals of this rifle, although it is believed that it uses gas operated action with tipping bolt locking. Top of receiver is fitted with Picatinny style rail which will accept a variety of sighting equipment on appropriate mounts. Typical sighting set-up includes either a 10X fixed power telescope or 4-12X or 7-22X variable power telescope sights.
Caliber(s): 12,7x108 (M99-I) or 12,7x99 / .50BMG (M99-II)
Operation: gas operated semi-automatic
Weight: ~12 kg (unloaded, less telescope sight)
Length: 1500 mm
Feed Mechanism: 5-round detachable box magazine