About: http://webisa.webdatacommons.org/363906180

Property	Value
http://www.w3.org/1999/02/22-rdf-syntax-ns#type	http://www.w3.org/ns/prov#Entity
http://www.w3.org/ns/prov#value	At the rear of the mounting plate there is a projecting arm that fits inside of and engages the trigger guard, to assure that the mount is correctly positioned.
http://www.w3.org/ns/prov#wasQuotedFrom	m1911.org