My RAW bottle gun came with an accessory rail that I could get an adapter for, like the picatinny adapter in the picture. My other bottle guns have nothing. To add a stud or rail on a wood stock can be a bit of a challenge, because of the lack of wood depth/bite. I wish with all the advances with the leading airgun manufactures, that they would think of the basics like a bipod attachment area. Hint! Hint!
