This kit offers a slim AR buffer tube folding adapter and our flat mount stock adapter for the C39 AK pistol. Using our adapter it attaches to the rear of your receiver through the sling hole. It enables you to fold your choice of AR15 M4 type buffer tube stock on your C39 pistol. Kit includes, our flat mount adapter, one slim line folding AR buffer tube adapter, and all of the hardware, bolts and Allen wrench for mounting. Upgraded folding adapter offers upgraded machined parts, machined improved locking buffer tube slot to prevent turning, upgraded hinge spring, improved locking hinge, slimmer design and harder coating. Rear Stock sold separately.**PLEASE TELL US IN THE COMMENTS SECTION IF YOU HAVE A NEWER V2 or RAS MODEL, OR WE WILL SHIP YOU THE STANDARD C39 ADAPTER WITH THIS SET UP*