PHILADELPHIA (AP) – PA Attorney General Josh Shapiro says the largest gun show promoter in the state has agreed to bar sale of do-it-yourself firearms assembly kits that officials say produce untraceable “ghost guns” increasingly popular among criminals. The agreement with Eagle Arms Productions is the first his office is aware of in the nation to curb the sale of such “80% receiver kits” long popular among hobbyists and firearms enthusiasts. Officials say the kits are not classified as handguns and are sold without background checks. The homemade weapons they produce lack serial numbers and other types of identification.