What is ak-19 stock?

As an AI language model, I do not have access to current market information, but concerning AK-47, which is a well-known assault rifle, there is no such thing as an AK-19 stock. The AK-47 typically comes in several variations or models, and each model may have different types of stock. Some of the common types of stocks are wooden, synthetic, folding, and telescoping. However, it is essential to note that any changes made to the stock of an AK-47 should be carried out by a professional gunsmith and must comply with the local firearm laws and regulations.