Descripton: Sure Cycle System For Beretta 301, 302, And 303 12 or 20 Gauge Shotguns. Improve the performance and reliability of your Semi-Auto Shotgun with the Sure Cycle System. Total stainless steel recoil spring system solves cycling problems caused by recoil system rust and corrosion; completely impervious to salt water, humidity and rain. Precision machined to exacting tolerances; reliably cycles all loads, including magnum and light target loads. Provides an increase in the cyclic rate that lets you get those second and third shots off quickly. Operates dry; requires no lubes or oils that can harden and slow down action in cold weather. Installs easily without modifications to gun.