The SIG recoil buffer was developed in response to market demand and fits all calibers of SIG 220 and 226 models, including the 9MM, 357Sig, 40 S'W and 45ACP. Like other Buffer Technologies products, the SIG recoil buffer works by cushioning the recoil from firing with a high-density, shock-absorbing polyurethane. Eliminating the metal-to-metal impact of the slide as it hits the frame improves both gun life and use. Over time, this continued force and impact can weaken the slide and jar internal workings of the gun, which can lead to cracks or potential malfunction.
