Colt has to compete with other companies that make M1911-style pistols such as Kimber and AR-15 rifles such as Bushmaster. Bushmaster has subsequently overtaken Colt in the number of AR-15s sold on the civilian market. Colt suffered a legal defeat in court when it sued Bushmaster for trademark infringement claiming that "M4" was a trademark that it owned. The judge ruled that since the term M4 is a generic designation that Colt does not specifically own, Colt had to pay monetary reimbursement to Bushmaster to recoup Bushmaster's legal fees. The M4 designation itself comes from the U.S. military designation system, whose terms are in the public domain.