With its ambidextrous features, lightweight, and superior finish, the ZEV Billet Receiver Set is the perfect foundation for any rifle build. It is precision machined from solid billet aluminum with tight tolerances and high quality standards to ensure consistent fit and function. The receiver has a Picatinny rail, integrated and enlarged trigger guard, flare cut magazine well, ambidextrous bolt and magazine release, threaded bolt catch, and an enhanced charging handle latch. The ejection port cover comes pre-installed. This model is compatible with large frame 308 rifles.