I have (3) Side Folding Stocks that are brand new. They are designed to fit H&K style MP5 rifles and MP5K style pistols. These are designed like the factory Choate stocks. The may work on the GSG and Walther .22 rifles also. May also work on the single pin HK93 style rifles and clones also. Asking $150 each. Located in Euless. Call or text Joe at 214-403-9018.