The M1917 bayonet was designed to be used with the US M1917 Enfield .30 caliber rifle, as well as with the seven different U.S. trench shotguns. The blade is 17 inches (43.18 cm) long. The M1917 Enfield was the U.S. Version of the British P-14 rifle, and the bayonets used are identical, down to the double groove in the grips, used to differentiate the bayonets from the P-1907 for the SMLE rifle.
The M1917 bayonet was used first during World War I by American soldiers on the Western Front. A sword bayonet design, the M1917 bayonet design was based on the British P1907 bayonet, which incorporated a long 17-inch blade. While designed primarily for the M1917 rifle the bayonet was fitted for use on all the “trench” shotguns at the time.
The M1917 was used frequently during the several different Banana Wars.
The U.S. continued to use the Word War I-made M1917 bayonets during World War II because of large stockpiles