Crafted from premium high-strength stainless steel, this mil-spec firing pin is meticulously engineered to offer exceptional durability and superior resistance to corrosion. Undergoing advanced precision machining and rigorous heat treatment processes, it guarantees a perfect fit and reliable ignition across a wide range of 5.56x45mm/.223 Remington AR-15 platforms. As a drop-in replacement, this firing pin seamlessly integrates with mil-spec AR-15 bolt carrier groups, simplifying installation and ensuring consistent, high-performance operation. Whether you're replacing a worn component or upgrading for enhanced longevity, this OEM firing pin provides unwavering reliability and optimal functionality. The mil-spec firing pin from Sons of Liberty Gun Works is an original equipment manufacturer (OEM) component specifically engineered for mil-spec AR-15 rifles Engineered with precision machining for enhanced reliability and durability, this firing pin guarantees consistent primer ignition and seamless cycling within mil-spec bolt carrier groups