This AR-STONER Upper Receiver Assembly in 9mm Luger upper will attach to virtually any standard AR-15 lower receiver, and with the addition of a 9mm magazine adapter block you can be range ready in just a few minutes. The AR-STONER AR-15 Upper Receiver Assembly in 9mm Luger comes with charging handle, shell deflector, and M-LOK handguard. This upper does not include a front or rear sight, making it a great platform for a red dot or scope (sold separately). FeaturesM-Lok handguardMil-spec bcg & charging handle includedGlock & Colt mag compatible only