A significant part of the Fort York Guard are the Royal Artillery Detachments.  These detachments man the field guns, which are fired daily during the summer months.  

The Royal Artillery has been an important part of Fort York since its first construction in 1793.  The strength of a fort's artillery often determines the strength of a fort and its ability to repel an attack by  land or sea.  Fort York has one of Canada's most diverse and unique collections of original guns.  This collection dates from as early as the mid-17th century right up to the 1870's, when the British Army left Canada.  Many of the Fort's ordinance are on display around the Fort and in a new artillery exhibit in the center blockhouse.

The Guard's Artillery Detachments fire the Fort's reproduction Cohorn mortar, a 1-pounder and a 6-pounder field gun.  They wear the Royal Artillery's distinctive blue jackets with yellow regimental lace, along with their unique style shako (caps).