About: http://webisa.webdatacommons.org/375902696

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 buffer tube insert (22) may be machined from metal or other appropriate material, or molded from a plastic material with sufficient toughness.
http://www.w3.org/ns/prov#wasQuotedFrom	freshpatents.com