CHIAPPA M4-22 GEN II UPPER 22LR 16" 10RD Just like the MFour-22 rifle, the Chiappa M4-22 Upper Receiver Kit takes advantage of AR platform dimensions and geometry. These upper receivers will fit on any MIL-SPEC lower receiver to create a .22LR rifle perfect for plinking or training. Type of Gun: Upper Caliber: 22 Long Rifle Action: Semi-Auto Barrel Length: 16" (406 mm) Capacity: 10 Feed In: Magazine Forend: Black Polymer Carbine Front Sight: Mil-Spec M4 Weight: 3.6 lbs Length: 23.6" Material: Polymer w/ Steel Barrel Finish: Matte Black Notes: Includes 2-10 Round Magazines