Operation Flashpoint AGS-17 Grenade Launcher (1.1)

Adds an AGS-17 30mm automatic grenade launcher for East and Resistance. The
The AGS-17 fires up to 6-7 grenades per second in autofire, and it has 29 grenades per magazine. The grenade's muzzle velocity is 185 m/s, and the maximum firing range is about 1700 meters.