Wikipedia
Entertech was a brand of battery-powered motorized water guns sold in the United States from 1985 to 1990 by the now-defunct LJN Toys. Unlike the colorful designs of many of the simple hand powered pump water guns of that time, most of the Entertech water guns were manufactured from black plastics with a matte finish to resemble actual firearms. Marketing materials and television spots would tout, "The look! The feel! The sound! So real! Entertech!" These water guns were revolutionary at a time when most children were purchasing inexpensive clear colored plastic squirt guns that were hand powered, had poor effective range and looked like toys. The Entertech line boasted realistic looks and water storage in the form of detachable magazines (in most models) like their real firearm counterparts. In addition, the motorized water pumps made noises that, while not realistic, added an extra level of sensation. Finally, the guns all boasted full automatic rate of fire (approx. 60 rpm) and a 30-foot effective range.