The drop in AR-15 Conversion Kit is an excellent choice for training or just want to target practice with the lower cost ammo.  This kit converts a standard .223 Remington, Wylde 223 or 5.56 NATO chambered AR-15 into .22 Long Rifle firearm. As an added bonus, this conversion kit comes with (3) 10-round .22 LR magazine.  The conversion is quick and easy to install and remove just by swapping out the conversion bolt carrier group and changing out the magazine.