Weapons in GTA IV

Weapons are a "precious commodity" in GTA IV, and are described as being "not easy to acquire"

On a GTA IV demo, the gun dealer Little Jacob had a 9mm, an SMG, and a Micro SMG in his car for sale for $100 each, which wasn't "breaking the bank" as the demo started the player off with $7500.

The following is from gtanet.com

Glock (probably a G17) Caliber: 9x19mm Capacity: 17

Developed in the 1980s by Austrian engineer, Gaston Glock, the eponymous pistol soon became the world's most popular civilian and law enforcement sidearm. With its polymer frame and simple, internal striker-fired mechanism, the Glock is both lightweight and extremely durable.

Desert Eagle Caliber: .357 Magnum, .44 Magnum, or .50 AE Capacity: 9, 8, or 7

In 1979, Magnum Research Inc. set out to create the first gas-operated, magnum-caliber pistol. While the end product is generally considered too heavy and too expensive to serve as a practical combat pistol, it hasn't stopped the Desert Eagle from becoming the weapon of choice for Hollywood (and video game) bad guys.

Micro Uzi Caliber: 9x19mm Capacity: 20

The smallest member of the Uzi family was introduced by Israel Military Industries in 1986 as a security weapon to fill the firepower gap between pistols and standard submachine guns. Between its short barrel and extreme rate of fire, things like aiming are but an afterthought.

MP5 N(A3) Caliber: 9x19mm Capacity: 30

The Heckler & Koch MP5 was originally developed in the 1960s, but has been further refined and revised over the years into a number of different models. Thanks in large part due to the number of options available, reliability, and accuracy, it is the most widely used submachine gun today.

SW MP-10 Caliber: 9x19mm Capacity: 30

The Special Weapons MP-10 (also known as the PXP-10) is essentially an MP5 clone with a custom polymer upper. Not much is really known about it, as it's apparently made in very small numbers by a very small and, err, mysterious company. At this point, it's hard to say whether this appears in the game in addition to the MP5 above, or if the MP5 has been replaced since the older screens..

M4 Carbine Caliber: 5.56x45mm NATO Capacity: 30

Despite some teething problems with the earlier M16 variant during the Vietnam War, Eugene Stoner's 1958 AR-15 design went on to become one of the most popular and versatile rifles in the world. Boasting a light weight, compact size, and a ridiculous amount of add-ons and accessories, the M4 has something for everyone.

AK-47 Caliber: 7.62x39mm Capacity: 30

Even after sixty years, Mikhail Kalashnikov's legendary AK-47 rifle is still a hard act to follow; both in reliability and popularity. Created with mass production in mind, the simple design and loose clearances resulted in a rifle that's practically indestructible, and that will remain functional with little maintenance or cleaning.

G3SG/1 Caliber: 7.62x51mm NATO Capacity: 20

The G3SG/1 is a version of the H&K G3 rifle optimized for sniper applications.

PSG1 Caliber: 7.62x51mm NATO Capacity: 20

The PSG1 is another H&K G3 sniper variant. It is unknown if both this and the G3SG/1 will be in the game, or whether the above is only in the art. Probably the latter.

Sniper Rifle Caliber: ??? Capacity: ???

This thing is really too generic to identify.. Might it be a Parker-Hale M85?

SPAS-12 Gauge: 12 Capacity: 8

This Italian semi-automatic shotgun was designed by the Luigi Franchi company in the late '70s. Originally intended for police and military use, the SPAS-12 features a heat shield under the pump/handguard to protect the user's hands during sustained fire. While this is a definite plus on a combat shotgun, it comes at the price of added weight.

Winchester Defender Gauge: 12 Capacity: 5

Based roughly on the classic Remington 870 (which is also featured in some artwork), the Winchester 1300 line is also known as the "Speed Pump" series thanks to the short, fast cycling of the action. This feature has made the shotgun popular for both sporting and security purposes.

RPG-7 Caliber: 40mm Capacity: 1

This classic anti-tank, rocket propelled grenade launcher was first used by the Soviets back in 1961. It has remained popular ever since thanks to its durability and low cost.

Molotov Cocktail

Box cutter

Switchblade

keep in mind this is not from me, i got this from gtanet visit the site for the pics of these weapons.