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. FEATURES: Composite Free Float Handguard 16” 4150 Solid Steel Barrel with Parkerized Finish Nickel Plated Bolt Gen2 Grip Semi-Automatic Aluminum Upper and Lower Receiver New 25 RND Magazine Functional Forward Assist Bolt Catch Charging Handle Adjustable Flip Up Sights Shell Deflector 4 ½ Pound Trigger Pull Ejection Port Cover Adjustable Stock 1/2 x 28 Threaded A2 Birdcage Popular AR Platform Easy Push Pin Disassembly Full Length Top Picatinny Rail 2-Position, Receiver Mounted Safety Lever Ambidextrous Sling Adapter Plate Mil-Spec FCG Allows For Drop in Trigger Assemblies Standard “bicycle lock” Storage Safety Compatible With Most Standard AR15 Components and Accessories