The GHK 553 original part #553-15 is the original part designed to work with the 553 GBBR. This is a non assembled part so it can be used to completely replace the stock parts or you can use it to replace standalone parts.
The GHK 553 original part #553-15 is the original part designed to work with the 553 GBBR. This is a non assembled part so it can be used to completely replace the stock parts or you can use it to replace standalone parts.