At the start of the game, there are over 250 NCR soldiers stationed across the Mojave.
Only two troopers wear combat helmets - Christina Morales, and another unnamed trooper directly outside the McCarran Concourse.
Examples of the weapons they may use include riot shotguns, marksman carbines, 12.7mm pistols, frag grenades and even assault carbines.
Troopers stationed at Hoover Dam usually have more health and are much better equipped than their regular counterparts.
It is possible for the drunk troopers on the Strip to have Rattan cowboy hats or other such non-uniform headwear on.
The Courier can still interact with them, and the trooper will say one of their phrases they would normally say.
The first time the Courier enters the Strip, a drunk NCR trooper can be found puking on Gomorrah's sign.
During the Second Battle of Hoover Dam, troopers can have stimpaks.
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NCR troops are far more dangerous in combat with the service rifle as of patch 1.3.0.452, due to its increased rate of fire and accuracy.
A trooper may spawn with a merc grunt outfit by one of the tents which contain a workbench in Camp McCarran and lean on it, similar to Isaac.
If the Courier sides with the Legion during the Second Battle of Hoover Dam, the troopers at the dam will use sniper rifles, marksman carbines, riot shotguns and 12.7mm pistols instead of their regular service rifles.
They may rarely use marksman carbines, such as one of the NCR troopers guarding President Kimball during his speech.
The Courier can call an NCR trooper in as backup through the NCR emergency radio (Accepted reputation with the NCR is needed).