FN/FAL, FALCON BLUE, Recoil Kit for Metric and Inch rifles. These are new production using the latest in materials and carry a lifetime warranty. That’s right…Lifetime warranty…that’s how confident we are. The fact of the matter is, most problems with feeding have to do with worn out recoil springs. Many of the recoil springs are factory surplus and could be 30 years old. Get your self a back up set, this is the cheapest insurance you can buy.