Weapons of CanadaGo Back to Countries Go Back To Weapons Home Infantry RifleRoss Rifle Mk IIA Canadian straight-pull bolt-action rifle used during World War I. While it was accurate, it was prone to jamming in the muddy conditions of trench warfare, leading to its eventual replacement. Please Rate the Content on this page 1 - Least Useful 2 3 4 5 - Most Useful Submit