I'm calling this one Maverick #1 because I have a larger, entirely different Halco "Maverick" with a bronze finish. This gun's on the smallish side - 8 1/2 inches with a 3 3/4 inch barrel. I assume both were marketed as TV tie-ins, probably with Maverick holsters. Were I rich, I'd be photographing those for you, too.
Halco was a toy distributor that sometimes put their own brand on guns made by other companies. Looks like this one was made by the Leslie-Henry Company.
More less-than-deadly weapons HERE.