Your AR-15 rifle represents a tremendous investment and says a lot about you as a person. To maintain your prized possession, you will need to replace worn or damaged parts at times. One of these replacements may be your bolt carrier group. When it is time to replace your bolt carrier group, you should take a look at this LANTAC Enhanced BCG. Bolt carrier groups (BCG), play a large part in managing the gas system of a semi- or full-auto weapon. Because of the extreme part they play in the operation of a firearm, it’s important to choose a replacement carefully. The M16 style BCG can increase lock time, and enhance the reliability of your rifle. An improperly staked gas key is the worst enemy of the competitive shooter or the law enforcement officer. If your rifle should start short-stroking in the middle of a competition or a shootout, you risk the loss of points or your life. The gas key for the LANTAC BCG is properly staked at four points with grade eight fasteners.