The heart of any rifle is its breech bolt; without it your weapon is useless. Our top-quality bolt carrier groups deliver on craftsmanship, component material, and finish coat. Offered in .223, 5.56, and 7.62 calibers, each is Magnetic Particle and High-Pressure Inspected as well. Knowing your rifle fires and cycles the way it should, is not just of your concern, it's our business too.