Weapons

One of the features of the original incarnations of Counter-Strike was that it did not feature fictional weapons like most games, instead using only existing firearms used the world over by real terrorist groups, counter-terrorist squads, armed forces, and law enforcement officials. The weapons are, however, only semi-realistic: many of them are incorrect in small details such as the caliber of ammunition or in their naming. Others do not operate their firing movement quite as their real-life counterparts do, and many of them are inaccurately 'mirrored', wherein the spent cases are ejected from the wrong side of the weapon. This is attributed to the fact that one of the designers was left-handed, and modeled the weapons being held in the left hand. They were then mirrored to the right side, resulting in these inaccuracies. The Counter-Strike team acknowledges that "not every weapon will be perfectly accurate or realistic". [4]
When early versions of the mod were released, the weapons were presented in the menus with their actual names and manufacturers such as Colt M4A1 and AK-47, but versions from 1.6 on featured fictional manufacturers (and some models) instead, such as "Maverick M4A1" and "CV-47" respectively. However, the internal names used by the console, key bindings and macros were not changed and thus often preserve the original designations; for example, the "Bullpup" (Steyr AUG) is still named "aug" internally, and so is the M4A1.