The absolute best combination of weapons for me is the following:
Body Equips

only GP items featured here)
Heavy Vest - Lets you take the pain, and if you need to go fast, brandish a knife or pistol.
Military Bandana - For added speed because face it, a headshot is a headshot.
Utility Backpack - For an additional weapon here and there.
Hammer Face Guard - Cuz anything else is kinda redundant. DON'T WALK INTO GAS OR FIRE.
Urban Camo - Makes you generally harder to see in urban areas, the standard camo you have on normally is your alternative for jungles and crap.
Weapons: (only GP items featured here)
G36E - The big middle finger up close and for light medium range sniping assistance.
L85A1 - The second best rifle, seconded only by the tried and true G36E.
Double Barrel Shotgun - The big middle finger that cleans your neck of that ugly mess you call a head as soon as you turn the corner.
Double Grenade Pack - 'nuff said.
M16A1 AP Mines - 'nuff said, yeh.
Standard knife and pistol - You got enough weapons on you to take down a Sperm Whale, what the frick else are you gonna need?