Tagged as error because, although the handgun is clearly based on the Colt Government Model 1911, the entire upper portion above the trigger and grip is drawn too far forward.
Unfortunately, I lack the skills to correct this properly... And others would argue that it is unethical.
True, Danbooru is an anime/manga repository and not really a weapons site.
However, even if you are (as I am) not a gun fanboy, but you've looked at enough handguns, you eventually do start to see glaring errors. There would be no way for the bullets to feed properly from the magazine (contained within the handgrip) into the chamber.
While there is quite a bit of chest showing, I would say there is still some chance of there being a bra present. Shoulder straps under the shirt, half-cups under the breasts etc. Therefore I am removing that tag until someone provides unequivocal evidence to the contrary.