Most Ingenious Design to Convert AK Stock into Side Folding Retractable Stock. Requires AK Stock Adaptor for Conversion and Compatible with Most 4-position/6-position. Model 4/Model 15 Retractable Stocks. Full Metal Construction with Matte Anodizing Finish. Most User Friendly and Easy Installation. Improves Mobility, Carry Versatility and Reduces Fatigue in AK Applications.Most Ingenious Design to Convert AK Stock into Side Folding Retractable Stock. Requires AK Stock Adaptor for Conversion and Compatible with Most 4-position/6-position. Model 4/Model 15 Retractable Stocks. Full Metal Construction with Matte Anodizing Finish. Most User Friendly and Easy Installation. Improves Mobility, Carry Versatility and Reduces Fatigue in AK Applications.