The airsoft guns used for training differ from civilian models. Guns manufactured for professional training are made to replicate the weight, feel and the sound of its real steel counterpart. In general, professional training airsoft guns are GBB models and enhanced with a weighted blowback mechanism to increase the force of the kick. Some are AEGs and are built with a blowback mechanism. They are also outfitted with muzzle protectors that amplify the sound to a decibel level comparable to that of a real firearm. The average FPS for professional training airsoft guns is higher than civilian models. Economically, airsoft is cheaper than simulation training. Benjamin Kratz, Fort Jackson's battalion executive officer, said that one blank M16 round can cost as much as 32 airsoft rounds. Airsoft can also be used in military simulations such as in malls or prisons to add to the emersions. There are different event producers like MiR Tactical holding these events.