ILMG0082 Grip Plug for GEN4 Glock 20 21 41

Brass Stacker - Solid stainless steel captured recoil guide rod assembly for Glock 20 20SF 21 21SF. Quality aftermarket CNC machined single stage replacement for Glock generation 1, 2 and 3 pistols. If you have a Glock Gen 4 pistol you will also need the "http://brassstacker.com/Guide-Rod-Adapter-for-Glock-Gen-4.html" GG4A guide rod adapter. The completely assembled drop in unit includes a heat treated, shot peened and stress relieved premium flat wire spring with a modified button head cap screw and black nylon washer. Black screws are hardened alloy steel and polished screws are stainless steel. The Brass Stacker guide rod has a 100% lifetime warranty and the ISMI recoil spring has a one year replacement warranty. Both are made in America. "Factory" Spring Weight is 17 lbs. Free domestic shipping.