The CMMG AR-15 Buffer Retainer Spring is an essential component designed specifically for AR-15 rifles ensuring the secure positioning of the buffer and buffer spring within the lower receiver. Precision-engineered for reliability and durability this high-quality spring helps maintain the optimal performance of your firearm by preventing the buffer from moving out of place during operation. Ideal for gunsmiths and AR-15 enthusiasts looking to replace worn parts or enhance their rifle's functionality the CMMG Buffer Retainer Spring guarantees a snug fit and seamless integration with your existing setup. With a quantity of one this product is a must-have for maintaining your AR-15's peak performance and longevity.