The CMMG 55DA2CF Handguard Slip Ring Kit is engineered for optimal security and reliability for your AR-15 platform firearm. Durably constructed, this essential component ensures your handguard is securely attached, enhancing the overall stability of your firearm during use. Note that it is not compatible with .308 AR firearms. Fits AR-15 platform firearms Includes slip ring, spring, and retainer Secure your firearm with ease, ensuring performance and safety on the field.