Introducing the Spare or replacement MCR Op-Rod spring, a critical component designed to ensure the optimal performance and longevity of your firearm. This high-quality Op-Rod spring is meticulously crafted to be fully compatible with all models of the MCR, Shrike 5.56 and the military-grade AMG-2. Engineered for precision and durability, it provides reliable operation under the most demanding conditions. Whether you're upgrading your current setup or in need of a dependable replacement, this Op-Rod spring is an essential addition to your arsenal. Its robust construction guarantees consistent tension and smooth cycling, enhancing the overall efficiency and reliability of your weapon system. Trust in the Spare or replacement MCR Op-Rod spring to maintain the superior functionality and performance standards expected from your firearm.