The sidearm grenade launcher is your one and only friend in that game. Bow and arrows have great range, damage and are silent. The Z93 rifle can drop heavy enemies with a headshot. The Bushman/Warrior are BEAST assault rifles. Do side quests before story shit. That way, you can get leveled up nice and neat and get good gear. Before I hit North Kyrat, I was pretty much down almost every skill. Gyrocopter is great for everything. Speed, maneuverability, height, etc.