Can you provide any evidence to back up your claims about the:
"always little better than west" specs in Chinese ballistics?
because we still don't know anything about muzzle velocity and effective range of the AMR-2. A comparison:
AMR-2
Calibre: 12.7mm
Muzzle velocity: N/A
Weight: 9.8kg (empty)
Length: 1,420mm (stock open); 1,230mm (stock closed)
Barrel length: 850mm
Magazine capacity: 5 rounds
Effective range: N/A
M82A1
Caliber: .50 BMG (12.7 x 99 mm)
Operation: short recoil, semi-automatic
Overall length: 1448 mm
Barrel length: 737 mm
Feed device: 10-round detachable box magazine
Sights: 10x telescopic
Mass: 12.9 kg [about 28.5 pounds] empty
Muzzle velocity: 854 m/s (M33 Ball)
Max effective range: 1800 m
Expected accuracy: Sub-MOA with match ammo
Unit replacement cost: $8010.00
Barrett M-95 Anti Material Rifle
23.5 pounds (10.7 kg) empty, without scope
Length 45 inches (114.3 cm)
Barrel length 29 inch (73.7 cm)
Cartridge .50 BMG
Action Bolt action
Muzzle velocity 854 m/s
Maximum range 1800 meters
Feed system 5 Round Detachable Box Magazine
If the specs posted for the AMR-2 are correct, it suggests the AMR-2 has a higher range but lower muzzle velocity than an M82A1, thus reducing penetration-against unarmored targets it would not make the slightest difference as if you are hit by a 12.7mm round you would be BADLY hurt-but against lightly armored vehicles, the M82A1 could prove to be the better weapon-but don't quote me on this-because we don't know the full specs, I am just guessing based on my experience observing the operation of US sniper rifle systems.
Anyway, the JS 12.7mm rifle is certainly impressive although the weight (12.5kg) is slightly heavy for a sniper rifle compared to the AWM (7.0kg empty) and the M24 Sniper Rifle System (5.9kg empty).
However, if the PLA is planning to use it in the anti-material/light armor role, I don't see why the rifle cannot be effective.