Grab a high quality 223 Wylde complete upper and shoot both 223 Remington and 5.56 NATO from the same AR-15 upper! .223 Wylde is a hybrid chamber and was developed to accommodate the match grade civilian ammunition of the 223 Remington and the high-pressure military grade 5.56 NATO. Both calibers are widely available and excellent for plinking, self-defense, competitive shooting, or hunting varmints. Our 223 Wylde uppers have a match grade chamber for high accuracy and include a BCG, rear or side charging handle, upper receiver, and 223 Wylde barrel. Find the exact configuration you want from our huge selection of barrel lengths, finishes, flutes, and more. And for completed firearms, check out our vast selection of 223 Wylde rifles and pistols ready to shoot out of the box!