About: http://webisa.webdatacommons.org/291644108

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	You will find parts other than the frame also have some really tight tolerances - just spotted a ???0.001 tolerance on one dimension for the thumb safety (lock, safety).
http://www.w3.org/ns/prov#wasQuotedFrom	m1911.org