York Redoubt has many examples of rifled muzzle loader cannon from the 1870s period. The rifled 16 cm muzzle loader was something different. It contains four brick emplacements built in 1868-72 to house rifled muzzle loader (RML) guns. Garrison Point Fort was initially armed with 9-inch and 10-inch rifled muzzle loader (RML) guns. It was a rifled muzzle loader and used his hexagonal, rifled-bore design.