. Weapon type. Double-barreled shotgun.
. Caliber. 12 gauge. 16 gauge. 20 gauge. 28 gauge. .410 bore.
. Action. Break action.
. Barrel length. 26–32 inches (66–81 centimetres)
The Winchester Model 21 was a high-quality American double-barreled side-by-side shotgun designed by Frank F. Burton in 1924 and produced by the Winchester Repeating Arms Company from 1931 to 1959. Winchester’s first double-barreled shotgun, the Model 21 represented Winchester’s attempt at producing a double-barreled shotgun of fine quality.