The CMMG AR-15 Pivot Pin Detent Spring is a crucial component for AR-15 enthusiasts looking to maintain or upgrade their firearm. This high-quality detent spring is specifically designed to ensure the secure operation of the pivot pin contributing to the overall stability and functionality of the AR-15 platform. With precision engineering it provides reliable performance and durability making it an essential part for any AR-15 build or repair. Sold individually this detent spring is an indispensable addition to your firearm maintenance toolkit.