What are the four best guns?

From the category of the SMGs:

• MP7A1;
• UZI;
• MP5;
• P90.

Continuing with the category of the Riffles:

• K7;
• TYPE89;
• G3A3;
• GALIL;
• FAMAS;
• AN94;
• SIG551;
• AK-74;
• K1;
• K2;
• M4A1;
• M16;
• G36-C;
• Steyr AUG.

Don't forget the Sniper Riffles category:

• M110 SAS;
• PSG-1;
• AWP;
• DRAGUNOV;
• FR-F2.

Along with the Machine Guns category:

• M249;
• MG36.

And ending with the Pistol category:

• DESPERADO;
• REMINGTON M870;
• BENELLI M1;
• M945 Compact;
• DESERT EAGLE;
• MR-73;
• COLT45;
• BERRETA M92;
• GLOCK 23.

So, from all of those weapons pick one from each category. The one you like the most or that is the best to be played with. By the way, the Machine Guns category is included on the Riffles category.