Define Gunbarrel. Gunbarrel synonyms, Gunbarrel pronunciation, Gunbarrel translation, English dictionary definition of Gunbarrel. Noun 1. gun barrel - a tube through which a bullet travels when a gun is fired barrel gun - a weapon that discharges a missi
Gunbarrel is a small, unincorporated community located in Boulder County, Colorado, just northeast of Boulder. It was established in the early 1900s and has a rich history tied to agriculture and local industry. The area is primarily residential and features a mix of single-family homes, townho...