The AR-15 Extra Power Carbine Buffer Spring is designed to provide increased strength and durability for the buffer system in your AR-15. This upgraded spring offers enhanced resistance, making it ideal for suppressor use, heavier buffers, or when using ammunition with higher recoil. By providing additional tension, the spring helps ensure reliable cycling, reducing bolt bounce and improving the overall stability of your rifle’s operation. It is a great choice for those who need to fine-tune their AR-15’s gas system or for users looking to increase the reliability and performance of their carbine-length buffer system.