The AUG HBAR can be found throughout the single-player campaign, and can come with a standard AUG A1 scope that is unavailable in Multiplayer. The scope uses the standard sniper scope graphic when zoomed, although this is inaccurate from the real-life counterpart.

In Multiplayer, the weapon is unlocked at Level 32. The AUG HBAR is a very unique weapon given its classification; it is an LMG-class weapon with low recoil and high damage (identical damage as theRPD, at 40 damage/shot at 666 RPM), but carries only 42 rounds in a magazine and reloads only slightly slower than the averageAssault Rifle. Due to its blend of LMG and Assault Rifle traits, the weapon is very popular online. The weapon also happens to be the best option for players looking to obtain the "Dictator" Title because of its low magazine capacity for an LMG.

Some players equip the AUG HBAR with Stopping Power and Foregrip (also an ACOG or Thermal if using Bling) and because of the moderate rate of fire, high accuracy, long range, and ability to penetrate light cover without FMJ, it can act as a fully-automatic marksman's rifle.

Trivia

• The reason why the AUG Scope is not available in Multiplayer is because it is operated in-game like a sniper scope. It has Sniper Scope Aimpoints and you must hold your breath to steady your aim. This would make the AUG HBAR a decent sniping weapon, and as such, an automatic one, which would make it unbalanced.
• In the Campaign, the AUG HBAR is actually just a standard AUG A2 assault rifle. In Multiplayer, it is the actual HBAR the game depicts it as with the Bipod-Mounted Barrel and Large Magazine.
• The AUG originally has an attached foregrip. In MW2's multiplayer, it must be unlocked.
• While MW2 was in development, the AUG used the L86 LSW's pick-up icon. It was later replaced and was given it's own unique one. This can be seen in the E3 Demo.
• The AUG and RPD are the only primary weapons in Call of Duty: Modern Warfare 2 to have only one iron sight, all others have two iron sights, a rear sight and a front sight.
• The charging handle on the left side moves upon firing, which does not happen in real life.
• The AUG is the least difficult weapon to get the Dictator challenge with due to it having less than half the magazine capacity of other light machine guns.
• Modern Warfare 2 is the first Call of Duty game to feature Austrian weapons: the AUG, TMP, and the G18.
• The designation for this rifle is a misnomer since the model is based on HBAR-T variant, with rail for attachments. An AUG becomes a HBAR when A1 variant (with Swarovski 1.5x scope) is equipped with a heavy 24in/621mm long barrel with bipod and an extended 42 round magazine.
• The AUG HBAR is said to be the weapon equivalent of the Type 99 as both have a high rate of fire and the fastest LMG reload.
• The AUG was #7 on Top Tens on the Military Channel.
• The multiplayer and campaign versions of the AUG HBAR are very different. The campaign version has a foregrip, lacks the bipod and carry handle and can have a scope attached while the multiplayer version lacks the foregrip but has a bipod and a carry handle, and may not have a scope attached. The reason for this is because the Campaign variant is actually an AUG A2, the standard AUG version, while the MP version is the correct AUG HBAR.
• In campaign the ammo counter on the bottom right corner of the screen will have the ammo of the AUG HBAR lined up like it would be on an assault rifle or submachine gun.
• This version is an older version than the modern day version, AUG A3.
• Also worth noticing in campaign, when other NPC's pick up this weapon, they do not hold it by the foregrip but instead they hold it like any ordinary rifle, it is odd to watch as the foregrip goes straight through the hands of the NPC's.
• The AUG is only used by Russian Arctic troops in singleplayer.