This article is from the The Terminator FAQ, by Karsten A. Loepelmann firstname.lastname@example.org with numerous contributions by others.
It is clear that the T-1000 duplicates the officer's uniform, as evidenced
after it walks out of the flaming wreckage of the semi.
When the T-1000 goes to Dyson's home, it is listening to reports on a police
radio. Comments during this scene on the extended LD indicate that whereas
T-1000 "became" the uniform of the policeman, it took the radio so it could
monitor police activity. The T-1000 is *not* listening to the radio on the
The point is made very clear that the T-1000 is also carrying a "real" gun at
Pescadero, when the gun is the only item that gets caught in the bars of the
door. However, when the T-1000 "pours" itself into the helicopter,
*everything* morphs--including its helmet and the accessories on its belt.
Obviously, these items were all replicated by the T-1000 as part of itself.