Nice, but where's the trigger?

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The following weapons are seen in the upcoming video game Call of Duty: Black Ops:

Call of Duty: Black Ops (2010)

Assault Rifles

AK-47

The AK-47 appears in the COD:Black Ops Teaser.

AK-47, 7.62x39mm

File:BLACKOPSAK47.JPG

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File:AKacinececko.JPG

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Steyr AUG

Steyr AUG, 5.56x45mm

File:STEYRAUGBLACKOPS.JPG

Steyr Aug with Arctic camo and silencer in Black Ops teaser.

Our skydiving protagonist takes "two is one and one is none" to a new level when he carries an AUG to complement his primary weapon, another AUG. You know, in case one explodes or something.

M4 Carbine type Rifle

A M4 Carbine type Rifle is seen being used.

M4 -5.56x45mm

File:M16BLACKOPS.JPG

M4 type gun as appeared in Black Ops teaser.

This weapon above is a m16a1, look at the handguard, is clearly the handguard of the a1. But the rifle has no forward assist,it is possiblely the early M16. maybe it's an AR 15.

Could it be the XM177 again, since it's the same character on both images and the hanguard is the same as in the M4 but with a slightly shorter barrel?

XM177

Can be seen in few screenshots from Xbox 360 gaming magazine. It may be that unknown M4-type gun. It cant be M4, because protagonist holding this gun can be seen in few moments from teaser/trailer in vietnam - And M4 was developed in late 90´s.