AR-Restor Hydraulic Carbine Buffer for M4 & M16/AR15 rifles with collapsible stock. This buffer replaces buffers that are 3 ¼” long. This is the best buffer on the market today. It provides reduced felt recoil, improved accuracy, reduced fire rate, and protects your valuable optics. The Enidine AR-Restor offers greatly enhanced performance through an easy-to-install drop-in replacement buffer in your carbine AR15 and M16. This buffer offers the same dependability and improvements that Enidine provided to US and NATO forces. The AR-Restor greatly reduces felt recoil and improves accuracy. By cushioning the rearward travel of the bolt carrier, the AR-Restor virtually eliminates muzzle rise allowing the operator faster, more accurate follow-up shots. For full-auto weapons, the AR-Restor slows the cyclic rate allowing the barrel to stay cooler and last longer. With the Enidine AR-Restor, achieve the full potential from your weapons system.