Brownells BRN-10/15 Buffer Retainer 5.56mm AR-15

The Brownells BRN-10/15 Buffer Retainer is a replacement rifle part designed for AR-15 platform rifles chambered in 5.56mm. This small but essential component retains the buffer and buffer spring within the lower receiver, ensuring reliable cycling and function. A direct-fit replacement for standard AR-15 builds, it is manufactured to maintain proper tolerances for consistent performance.