Most modelguns commonly available today are designed to highly replicate the physical appearance (some bear the authentic trademarks and markings too) and in full scale of the real gun counterpart. Many are even made to highly replicate the internal mechanisms so that they are able to strip-down exactly and imitate closely the functionalities of the real counterparts. They operate exactly like a cap gun, using a small plastic percussion cap to produce gunfire sound, spark and blowback operation (for automatic models), but strictly not able to shoot any projectiles.