Specificiations:
- made out of one of the best polyurethane on the market (German made)
- lifetame of at least 6000 rounds
- compatible with most AK platforms 
- for use with underfolders you need to cut along the bottom step to make space for stock release button.
- makes recoil more soft
- great for suppressor use
- elimanates the clang of steel striking steel
- will work with 12 gauge magnum shells
- designed in a way that doesn't rest on the spring, but fixes to the reciever