About: http://webisa.webdatacommons.org/295870361

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	according to the Remington ballistic tables for most of their ammo they say about 7-10 not sure of the barrel length and other factors but I beleive they usually go with a 24-26 barrel.
http://www.w3.org/ns/prov#wasQuotedFrom	ar15.com