Most useful Weapons:
 Desert Eagle: One shot One kill, excellent range.
 M4 Assault Rifle: 50 rounds, range exceeds AK47 (in game).
[3a] Missile Launcher (Heat Seeking) especially for the Interdiction Mission and Pier 69, also Gang Wars. Anti-Aircraft.
[3b] Missile Launcher (RPG): Blast radius ‘shoots around corner’, through walls, decks, hedges. excellent range.
 Molotov cocktails: mass killings, through walls, decks, hedges. Close range. Doesn’t affect CJ.
 Any SMG: As it’s used only on Motorcycle during Gang Wars.
That’s all anyone needs. Unless you’re just fooling around and want to get CJ killed.