About: http://webisa.webdatacommons.org/384689204

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	The receiver is pre-drilled (or so I am told) for these and the bases are one piece(base and rings).There are 2 but each one is a base and ring together in one piece.
http://www.w3.org/ns/prov#wasQuotedFrom	thefirearmsforum.com