Best ak-47 stock option on the market - Vltor RE47 AK47 Receiver Extension Modstock Adapter Aluminum Black

This is honestly the best option out there. It's not the cheapest but I've tried them all and this one is by far the best. The fit and finish is fantastic, it's easy to install, it's all metal in every place that counts only plastic part is the side gap plug but that doesn't need to be metal as it's just decorative in fact, it's better it's plastic in case you need to shave a little off to get it to fit perfectly)