The M4-22 PRO is a premium .22 caliber semi-automatic tactical rimfire rifle with aluminum upper and lower receivers and all the features of a true M4. The M4-22 PRO is largely mil-spec compatible and will accept most AR15 stocks, handguards and sights. The M4-22 has the look, feel and controls of a true M4 and is a perfect platform for training applications or backyard plinking. FeaturesComposite Free Float Handguard16 inch 4150 Solid Steel Barrel with Parkerized FinishNickel Plated BoltGen2 GripAluminum Upper and Lower ReceiverFunctional Forward AssistBolt CatchCharging HandleShell DeflectorEjection Port CoverAdjustable Stock1/2 x 28 Threaded A2 BirdcagePopular AR PlatformEasy Push Pin DisassemblyFull Length Top Picatinny Rail2-Position, Receiver Mounted Safety LeverAmbidextrous Sling Adapter PlateMil-Spec FCGAllows For Most Drop in Trigger AssembliesCompatible With Most Standard AR15 Components and Accessories