The Battle Arms Development Quick Release Rear Takedown Pin with Spring & Detent delivers rapid, secure field adjustments for AR-15 rifle builds, combining durable construction with smooth, reliable operation for dedicated shooters and professional builders alike. Engineered for AR-15 receivers, this rear takedown pin integrates a spring and detent system that provides positive engagement and easy removal or reinstallation without tools, enabling swift chassis changes, quick access to internal components, and streamlined maintenance during range sessions or field scenarios. Crafted to exacting tolerances, the pin maintains consistent alignment under stress while resisting unwanted movement, which translates to enhanced reliability during dynamic shooting or precision assembly work. The compact, low-profile design preserves the aesthetics and balance of the platform, making it a practical upgrade for those who demand fast, repeatable takedown capability without sacrificing rigidity or fit. Ideal for rifle builds and modifications where quick field servicing is beneficial, this component supports a clean, secure interface between upper and lower receivers, enabling shooters to swap components or perform maintenance with confidence. Battle Arms Development delivers a trusted solution that integrates seamlessly into AR-15 configurations, helping you stay ready for diverse field and range applications.