Link doesn't work to wherever you wanted to bring attention to. Looks like a problem on their end.
It is far more common in the Army to not be issued a pistol at all rather than a pistol with not holster, but it does happen.
The most common holsters I have seen issued in the Army are Safariland ALS types with the rotating thumb hood, internal retention, drop leg, quick release holster. Can't find the model number on their site after a brief search. I wore it for all of an hour, constantly adjusting it and could not get it comfortable. I ended up using a SERPA holster for my tour using a belt setup when not on mission and a STRIKE plate on a quick disconnect mount to my plate carrier. Pistol lanyards are also a very common method of weapon retention that many of my soldiers used as it was much cheaper than getting a whole SERPA set.