Made from High Strength SUS Stainless Steel
Removable Buffers to Control Cycle Rate and Recoil
Pre-Built, Complete with High Strength Recoil Spring
2 kinds of spring with different wire diameter can be matched or cut freely
Extreme Wear Resistance
"Installing this Angel Custom spring guide will immediately provide you a noticeable "smoother" recoil and blowback yielding an increased performance.