This hybrid chamber 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.
Side charging AR-15s also have many advantages including being easier to use with scopes and improved ergonomics. Bear Creek Arsenal side charging uppers are made from 7075 aircraft-grade aluminum billets.
