New American arms tested.
United States of America (USA).
Title reads: "Big Railway Guns Rock Small Target Eight Miles at Sea - Coast Artillerymen fire 12 inch mortars with great accuracy at Forth Hancock, N. J."
Various shots of American railway mounted 12 inch mortar in action at Fort Hancock, New Jersey. Several shots of the loading, setting, firing and the shells landing eight miles away at sea very close to a small target.
Title reads: "Army Machine Gun Experts Train To Repel Air Attack - Infantry marksmen demonstrate accuracy of modern rapid fire at Camp Dix, N.J."
Various shots of American soldiers firing new rapid fire machine guns. They demonstrate their great accuracy on dummies, and small gas-filled balloons. They further demonstrate their accuracy by cutting down a tree with concentrated fire.
Note: Second item has American voiceover.