Identical in outer dimensions as SYSTEMA's Ball Bearings, these bushings are manufactured by cutting / grinding 303 stainless steel. The main function of the Stainless Steel Bushings is to extend the durability of the Spur Gear Bearings by preventing premature damage caused by the use of a high tension spring.
A Channel design has been implemented by SYSTEMA along the bearing hole to collect grease, thereby preventing the loss of lubrication during use!
Please note that all aftermarket products may require professional installation. For increased compatibility, please use consistent aftermarket branded parts, or consult your local gunsmith.