Chiappa Firearms .22 conversion allows you to shoot inexpensive 22 rimfire ammunition for training or just for fun! The M4-22 Conversion contains everything necessary to change your AR-15/M-16 from it's existing caliber to the inexpensive .22LR rimfire cartridge.

The conversion takes less than a minute and is achieved with no permanent alterations to your firearm. It can be quickly returned to it's original caliber. The M4-22 Conversion allows semi-auto .22LR fire in ANY milspec AR firearm platform. This is a complete upper with a barrel designed specifically for .22 LR ammunition, don't risk damaging your centerfire 5.56 barrel with lead bullets or settle for poor performance due to a fast twist rate.

Comes with TWO 28* or 10 round capacity magazines. The design allows for the use of any Atchinson style conversion magazines to be used.

*Check local & State laws for allowed magazine capacity before ordering.

The muzzle end of the barrel on these is not threaded, the flash hidder has a set screw. If you are in a state that allows threaded barrels and would like the barrel threaded we can thread the barrel 1/2x28 for you so that it will accept any standard AR barrel accessory for a additional $40.00 however threading of the barrel can and most likely would void the factory warranty and no returns accepted with threaded barrel so keep that in mind.