This guide is made from personal experience and the knowledge from several hours poured into this game. If you have any qualms or questions please let me know. ^.^
This took so long to write T.T
M249: Medium/Close Range Light Machine Gun with high recoil and large magazine size. Aim for the torso starting near the middle of the body, and don't be afraid to use your entire magazine. Hip firing brings the best results.
Saiga 12: Close Range Automatic/Semi-Automatic Shotgun with medium recoil and medium magazine size. The weapon has a large spread that makes long range seem useless. However, the automatic firing of the weapon forces the pellet spread to tighten which makes it rather easy to get long range kills. Hip aim and stick the gun out towards the enemy for the best results.
M4: Medium/Close Range Automatic/Semi-Automatic Rifle with medium recoil and medium magazine size. The weapon is pretty straight forward, press the trigger and aim down the sites, with it's medium recoil you'll have to drag the weapon down slightly. Aim down the sights starting at the torso for the best results.
AK47: Medium/Close Range Automatic/Semi-Automatic Rifle with high recoil and medium magazine size. The weapon may be the easiest to get a headshot with if you know how to exploit it's recoil. At first when the weapon starts firing and you have aimed towards the enemy's head immediately drag your weapon down halfway. This causes the bullet's velocity to change from going into the air to instantly shooting the bot your aiming at. Aim down the sights starting at the head for the best results.
AUG: Long/Medium Range 3RB (3 Round Burst)/Semi-Automatic Rifle with low recoil and medium magazine size. It's 3RB is most effective while picking off enemies at Close/Medium Range. However, if you need a quicker firing rate at longer ranges (and you have the trigger finger for it) switch to Semi-Automatic fire. Aim down the holographic sight starting near the upper torso for the best results.
M16: Same as the AUG ^.^
Famas: Medium/Close Range Automatic/Semi-Automatic Rifle with high recoil and medium magazine size. This weapon is best used a close range while hip firing starting at the lower body and letting the recoil bring the barrel towards their head for a headshot if the high damage hadn't already killed them. Hip fire for the best results.
ADA 9mm: Medium/Close Range Automatic/Semi-Automatic SMG with low recoil and medium magazine size.
P90: Medium/Close Range Automatic/Semi-Automatic SMG with high recoil and large magazine size. The gun's recoil is somewhat borked when it comes to holding it with both hands. all you need to do is aim at your enemy and aim the gun down, but when you fire the recoil will set the weapon in front of you quickly. Aim for the torso for the best results.
UMP: Same as the ADA 9mm
PP-Bizon: Medium/Close Range Automatic/Semi-Automatic SMG with low recoil and high magazine size. Aim for the head for best results.
MP5: Medium/Close Range Automatic/Semi-Automatic SMG with low recoil and medium magazine size. Aim for the upper torso for the best results.
Mini Uzi: Close Range Automatic/Semi-Automatic SMG with medium recoil and medium magazine size. It is highly recommended that this weapon is used at close range, however it works great at firing at 2 or more enemies to bring their health down to deal with them quickly with other weapons. Aim for the torso for the best results.
Kriss Vector: Medium/Close Range Automatic/Semi-Automatic SMG with low recoil and a medium magazine size. The fire rate is quicker than most SMG's with a decent sight on it to boot. Aim for the torso and make your way towards the head for the best results.
Barrett M99: Long/Medium Range Semi-Automatic Sniper Rifle with high recoil and a 1 round magazine. The weapon's barrel makes it rather easy to aim for a 1 shot instant kill that is good when quickly switching between targets. Aim for the head for the best results.
Modern Hunting Rifle: Same as the Barret M99 except with a larger magazine. ^.^
AWP G3: Same as the Barrett M99 except with a larger magazine ^.^
SCAR: Long/Medium Range Semi-Automatic Rifle with low recoil and medium magazine size. With a holographic sight it makes it rather easy to aim for the head with low recoil. Aiming for the upper torso or head will bring the best results.
L96A1: Same as the SCAR ^.^
SPAS-12: Same as the Saiga 12 except with a smaller tube size and Semi-Automatic Fire.
M590: Close/Medium Range Semi-Automatic Shotgun with medium recoil and a medium tube size. Firing the weapon while pumping it quickly reloads and allows for almost automatic levels of firing as long as you don't let the recoil get out of hand. You can either aim down the sights or hip fire for the best results.
Sawed-Off Double Barrel Shotgun: Close Range Semi-Automatic Shotgun with medium recoil and a 2 Shell Tube. You need to get close, and aim for the head with this weapon for the best results.
Desert Eagle: Close/Medium Range Semi-Automatic Pistol with high recoil and low magazine size. With it's high recoil and low magazine size aim for the upper torso and make sure to watch your ammo. Aiming down the sights bring the best results.
Revolver: Same as the Desert Eagle ^.^
Five-Seven: Close Range Semi-Automatic Pistol with low recoil and medium magazine size. Aiming down the sights brings the best results.
TEC-9: Close Range Semi-Automatic Pistol with low recoil and low magazine size. It has a decent fire rate that is best utilized when aiming at the upper torso as well as the head.
M9: Close Range Semi-Automatic Pistol with low recoil and low magazine size. This is just a faster, but weaker version of the M1911. Aim at the upper torso and then move towards the head for the best results.
Glock: Close Range 3RB/Semi-Automatic Pistol with low recoil and medium magazine size. When near an enemy 3RB is your best friend especially when you aim at the upper torso and let the recoil of it's fire climb toward the head for an easy headshot. If a headshot can't be made then just let the weapon's 3RB or quick Semi-Automatic Fire take care of your enemy's torso. Aiming down the sight brings the best result.
M1911: Close Range Semi-Automatic Pistol with low recoil and low magazine size. When near an enemy it's best to start by aiming at the torso and firing while making an upward motion towards the head. Watch your ammo and make sure your shots hit their target.
Knife: Close/Medium Range Melee Weapon. I'd recommend running towards a enemy that has it's back turned or is in a firefight with another Bot. If these can't happen and you find a weapon aimed at you, find cover and wait for them to come to you. Throwing the weapon is not recommended if you are not of ample skill, and besides the point the hitbox for the knife when thrown is iffy at best.