BudsGunShop.com - AR 15 compability?

Most Item will require Modification to fit here is a good review probably only the stock could be changer easily thetruthaboutguns.com/2011/10/tyler-kee/umarexcolt-ar-15-22-part-1/

Scott, the hand guard, trigger and stock are interchangeable. This is a dedicated 22lr rifle and would need a bolt and heavier buffer spring. You would probably be better off buying a 22lr conversion kit for a base 5.56 rifle platform than converting a base 22 platform. This is for the sake of reliability.