These Ciener (Atchisson) Conversion units contain all the parts necessary to change your M16 Select Fire rifle from it's existing .223 caliber down 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. Includes (1) 30 rd. magazine. Factory New.

-- IMPORTANT --

Due to the many manufacturers of AR15/M16 type weapons and components, minor fitting and/or adjustments may be necessary to obtain reliable functioning of the Ciener conversion kit in your weapon.  MacTec is not a warranty or repair center for these products and any issues related to a factory defect must be addressed with the manufacturer (Jonathan Arthur Ciener, Inc.).  MacTec cannot accept any returns of these conversion units that have been used, installed, or attempted to be installed in the customer's weapon.  Please refer to our general Return Policy for details.