These are a few weapons from Call of Duty Black Ops that has been confirmed.
CAR-15Description: The CAR-15 uses the 5.56x45mm NATO cartridge that can penetrate approximately 15 - 20 inches into soft tissue. CAR-15 rifles are highly configurable and customizable, so they are commonly fitted with several accessories.
M16A1 Description: The M16A1 is a lightweight, 5.56x45mm, air-cooled, gas-operated, magazine-fed assault rifle. Although old, the M16A1 is still standard issue in many world armies.
AK-47Description: The AK-47 is a gas operated 7.62mm assault rifle, which was first developed in the Soviet Union. The AK-47 offers extremely high reliability.
AUGDescription: The AUG is an bullpup gas-operated assault rifle, designed in the 1970s. It uses the 5.56x45mm NATO cartridge.
The weapon has a integrated 1.5x telescopic sight which makes the weapon very accurate.
Heckler & Koch G11Description: The Heckler & Koch G11 is a non-production prototype assault rifle. The weapon uses a 4.73x33mm caseless ammunition and has rather high recoil.
MP5KDescription: The MP5K is a 9mm sub machine gun developed in 1976 for close quarter battles.
RPK Description:The RPK is a Soviet light machine gun developed in the late 1950s
SPAS-12 Description: The SPAS-12 is a dual-mode combat shotgun, which can be used as a semi-automatic or pump-action firearm.
MAC-10 Description: The MAC-10 is a highly compact machine pistol. The barrel is threaded to accept a silencer.
.357 MAGNUM Description: The .357 MAGNUM offers high stopping power with low recoil, noise, and muzzle flash.
M1911Description: The M1911 is a single-action, semi-automatic handgun which uses the .45 ACP cartridge.
RPG-7Description: The RPG-7 is an anti-tank rocket propelled grenade weapon, but it can also be used as an anti-personnel weapon thanks to its splash damage. The RPG-7 is extremely inaccurate outside of medium range.
M202Description: The M202 is a multishot rocket launcher, which features four tubes that can load incendiary rockets.
CHINA LAKE GRENADE LAUNCHER Description: The CHINA LAKE GRENADE LAUNCHER is a pump-action grenade launcher which can fire approximately 15 rounds per minute.
CrossbowDescription: Crossbows are silent killers. With a crossbow the user can fire an arrow with more force than with a normal bow, thus making it extremely lethal.