Double __ Shotgun, Fires Two Shots in Sequence
Puzzle 11 of Love Songs Pack
Question is: Double __ Shotgun, Fires Two Shots in Sequence
and the answer is: BARREL
Word Meaning:
BARREL — (countable) A round (cylindrical) vessel, such as a cask, of greater length than breadth, and bulging in the middle, made of staves bound with hoops, and having flat ends (heads). The word is sometimes applied to a similar cylindrical container made of metal, usually called a drum.
Definitions from Wiktionary.