The classic Sawed-Off deals very heavy close-range damage, but with its low accuracy, high spread and slow rate of fire, you'd better kill what you hit. It has been copper plated.
Desert Eagle | Blaze
Glock-18 | Brass
P2000 | Scorpion
AUG | Copperhead
AWP | Snake Camo
Sawed-Off | Copper
AK-47 | Predator
M4A4 | Desert Storm
SCAR-20 | Palm