AK-47 rubber buttpad. 
Customers sometimes ask about an option for a longer stock for their AK.
These recoil pads for grenade launchers are a great option.  They add an additional 1” or so to the overall length of pull and have the following features:
Comes with velcro strap for attaching to metal triangle stocks. 
Otherwise it fits very snug over wood stocks without the strap. 
Reinforced Slip-on Design for a Quick and Secure Installation
Compatible with Most Wooden and Composite AK/AKM Fixed Stocks
Recoil Absorbing High-strength Rubberized Construction