The Maxim JP Silent Captured Spring System is a premium component designed specifically for Maxim Defense Industries' CQB stock system. Engineered for precision and reliability it features a durable construction crafted from tungsten and stainless steel ensuring long-lasting performance. Its innovative design requires an open channel in your bolt carrier group assembly allowing the guide rod to pass seamlessly during fire. With a sleek silver finish and advanced capture spring technology this system delivers smooth quiet operation and enhanced functionality for your firearm setup.