Delta 900 Mag
"Pump action crossbow with detachable magazine.  Designed for the hunting market, the Delta 900 is also an effective sniping weapon"

Capacity:  5 rounds
Damage:  High
Range:  Medium
Ammunition:  Bolts
Zoom:  4x

This is actually a pretty good weapon.  Long room, high damage, but slow reloading and small clip.

Wolfram P2K
"Light weight, high capacity, semi-automatic pistol.  Another classic from Wolfram.  Alternate fire is silenced"

Capacity: 16 rounds
Damage: Low
Ammunition:  9mm
Zoom:  zone

This is your basic starting weapon.  Although the silenced mode is pretty useful, this is a pretty lame gun.  It is not powerful at all.  Take a guard's gun and use it instead.
 

Raptor Magnum
".44 Magnum semi-automatic pistol.  The heavy caliber round means there is only limited magazine capacity.  Alternate fire uses laser sight."

Capacity: 8 rounds
Damage: High
Range: Low
Ammunition: .44 caliber
Zoom:  None

A nice gun.  It can stop a guy in their tracks, and reload fast enough to get the next one.

Mustang .44
".44 MAgnum revolver from Mustang industries, popular with big game hunters.  Slow to fire and reload, this pistol has impressive range and stopping power."

Capacity:  6 rounds
Damage:  High
Range:  Medium
Ammunition:  .44 caliber
Zoom:  2.5x

This is your classic high risk gun.  If you can hit your target, use it, but if you have bad aim, stay away.

Meyer TMP

"Small submachine pistol with a high rate of fire.  Light weight, but remarkable tough and very reliable.  Alternate fire is single shot."

Capacity:  25 rounds
Damage:  Low
Range:  Medium
Ammunition:  9mm
Zoom:  None

This is a low risk weapon, very fast firing.

Ingalls Type 20
"Silenced heavy machine pistol with a high rate of fire.  Popular among terrorists and urban criminals.  Alternate fire is single shot"

Capacity: 30 rounds
Damage:  Medium
Range:  Medium
Ammunition .45 caliber
Zoom:  none

I have only used this gun in one mission, but It is fun to fire.  Very fast, and very damaging.

MB PDW90
"High power, high capacity personal defense weapon from Munitions Belguiqe.  Reloading however is rather slow.  Alternate fire is single shot."

Capacity:  50 rounds
Damage:  Medium
Range:  High
Ammunition:  5.7mm
Zoom:  1.5x

This gun is incredibly powerful, but you can use the 100 bullets up in less than a minute.

Soviet KA-57
"Heavy assault rifle with good stopping power, but limited accuracy.  Standard issue weapon for the Russian Military.  Alternate fire is 3 round burst."

Capacity: 30 rounds
Damage:  High
Range:  High
Ammunition:  7.62mm
Zoom:  none

Very cool sounding.  And it's firing rate makes good use of ammo.  A great all around gun.

Deutsche M54
"Heavy caliber submachine gun.  An update to the classic Deutsche M9, this sacrifices rate of fire for more stopping power.  Alternate fire is 2 round burst."

Capacity:  25 rounds
Damage:  Medium
Range:  Medium
Ammunition:  .45 caliber ACP
Zoom:  None

This is a pretty nice gun.  The clip is a little small, but it has a rate of fire well suited for taking out a lot of guys.

Deutsche  SA90
"Automatic sniper rifle with powerful sights.  Capable of semi-automatic fire, this is designed for military use."

Capacity:  20 rounds
Damage:  High
Range:  Very high
Ammunition:  7.62mm
Zoom:  5.5x

Don't be turned off by the fact that this is a semi-automatic.  This gun is extremely powerful, and will kill any enemy in 2 or 3 shots at the most.

Deutsche M95
"Silenced submachine gun with a telescopic sight.  Designed for covert missions.  Alternate fire is laser targeted, but single shot only."

Capacity:  30 rounds
Damage:  Low
Range:  Medium
Ammunition:  9mm
Zoom:  4x

This is an all around piece of crap.  Low damage, and low firing rate.  Stay away from it.
 

Mustang MAR-4
"Fast firing assault rifle carbine manufactured by Mustang industries for the US Military.  Alternate fire is 3 round burst."

Capacity:  30 rounds
Damage:  High
Range:  High
Ammunition:  5.56mm
Zoom:  2x

A very powerful gun, but will use your ammo very fast.  Be careful.

Mustang MAR-4GL
"A MAR-4 carbine rifle with an under barrel single shot grenade launcher.  Alternate fire is HE (high explosive) grenade."

Damage:  Very High
Range:  High
Ammunition:  40mm
Zoom:  None

It's only seen once in the game, in Turncoat on 00Agent, but it's fun to use.  You will only find about 4 shots for the grenade launcher.  Use them wisely.

Meyer Bullpup
"Compact and highly accurate assault rifle.  Carrying handle features a telescopic sight.  Alternate fire is fully automatic"

Capacity:  30 rounds
Damage:  High
Range:  High
Ammunition:  5.56mm
Zoom:  3x

Extremely good gun.  You can use it's burst fire and scope for shooting at a distance.

Suisse SSR 4000
"Superbly accurate sniper rifle with silencer and telescopic sight.  Designed for covert missions, the bolt action makes it slow to fire and reload."

Capacity:  5 rounds
Damage:  High
Range:  Very high
Ammunition:  7.62mm
Zoom:  5x

It can kill with 2 shots, but each bullet must be loaded separately.

Frinesi Special 12
"Shotgun capable of automatic fire.  Inaccurate at a distance and slow to reload, but powerful"

Capacity:  8 rounds
Damage:  High
Range:  Low
Ammunition:  12 gauge
Zoom:  None

This is an insane gun!  The automatic fire can tear apart anything!  But you have to reload each shell separately.  Make sure your enemy isn't that far away, also.

GL 40
"Single shot grenade launcher.  Usually these grenades explode in impact, but on an alternate fire they explode after a five second delay."

Capacity:  1 round
Damage:  Very high
Range:  High
Ammunition:  40mm
Zoom:  2x

This devastating can blow up anything with a single shot.  That's good, because a single shot is all you get.

AT 420 SENTINEL
"Multi tube missile launcher designed for use against armored vehicles or helicopters.  Once fired, missile is guided by user by pointing laser sight out at desired target.  Alternate fire is unguided fully automatic.

Capacity:  4 rounds
Damage:  Very high
Ammunition:  Missiles
Zoom:  4x

There is no getting away from the Sentinel's guided rocket.  But you can only have 8 rockets max.

RL 22
"Disposable anti-tank rocket launcher.  Very damaging but must be discarded after a single use."

Capacity:  1 round
Damage:  Very high
Range:  Very high
Ammunition:  Rockets
Zoom:  2x

This thing can do extreme damage.  But you can only hold 1 rocket, so you have to get another RL 22 after each shot.
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Stun Grenade

"These are used to disorientate and subdue targets rather than do permanent damage, generating 1,000,000 candela of light and 175 decibels of noise.  This will cause 5-15 seconds of disorientation to anyone within 30 feet."

There are extremely useful.  If you are faced with many enemies, tossing one of these will stun them all.  But make sure you are far enough away from the thing to get stunned yourself!  This will have the same effect on a person as hitting them with the watch stunner.