The Hornady Hot Tub Sonic Cleaner takes sonic cleaning to the next level. The Hot Tub features 9 liter (2.3 Gallon) capacity that when combined with its size is able to accommodate and clean a complete 16 AR-15 upper receiver. This is the perfect way to quickly and easily clean a dirty upper receiver after a long day at the range, shooting a 3-gun match or a long day of slide firing a few magazines down range. The Hot Tub has four transducers and a heating element that enhances cleaning action which is very important when cleaning gun parts. When combined with One Shot Sonic Clean Cleaning Solution the microjet action of the Hot Tub removes built up carbon residue and other debris from gun parts, cartridge cases and anything that will fit in the tank.