Assertion: gatling gun's barrel | /r/AtLocation | proper position
Facets:
value: by a muzzle-piece
type: CAUSE
Source sentences:
text: The barrels are inserted in the breech-piece around the shaft, on a parallel line with the axes of said shaft, and held in a proper position by a muzzle-piece, bored by the same gauge as the holes for the breech-piece for the reception of the barrels.