This is based on the M40 sniper rifle introduced in the mid 1960s for use by US Marine Corps. Basically, the M40 was a modified Remington 700 given a Mil-Spec. M40s were used in Vietnam and in later campaigns with great success, proving itself to be a reliable and deadly accurate weapon.

Sniper Specification
Real Weapon Battle Storm Weapon
Ammunition 7.62x51mm NATO (.308 Win) Infra Red Laser 980nm
Length 1117 mm 1170 mm (with barrel unit)
Weight 6.57kg 3.72kg
Magazine Capacity 5 rounds Adjustable 1-99, unlimited
Rate of fire N/A Adjustable 1-1500 rpm
Effective Range About 800M Adjustable