Genuine Classic Army 

Retractable Stock

This is the best in class Classic Army retractable stock. It will fit right on your GSG carbine using either your factory mounting screw or available HK pin. The new version has a very solid fit. 100% money back guarantee.

GSG 5 screws pins gsg5 gsg-5 HK stock stocks genuine MP5 HK hooks classic army ris retractable folding stock

Here's How To Install The Sling Clip