The City Council Tuesday unanimously approved an ordinance to prohibit the possession, purchase, sale, receipt and transportation of "ghost guns" in Los Angeles. The ordinance prohibits the possession, purchase, sale, receipt or transport of a non-serialized unfinished firearm frame or receiver or non- serialized firearm. Such weapons -- known as "ghost guns" because they are virtually untraceable -- can be assembled by unlicensed buyers from legally purchased kits.