Assertion: shotgun's barrel | /r/CapableOf | mat grooved chamber
Facets:
value: externally
type: DEGREE
Source sentences:
text: Dissatisfied with the rapidly overheating fixed barrel of the m/21, Carl Gustaf began to design a new quick-detach mechanism for the barrel that mates the externally grooved chamber to a series of rotating flanges in the receiver operated by a locking lever.