Use the search function.
http://m14forum.com/searchresults.p...299503481945:7056685561&cof=FORID:10&ie=UTF-8
Read the article on the sadlak website
http://www.sadlak.com/si_rifle_parts_pistons.html
http://m14forum.com/searchresults.p...299503481945:7056685561&cof=FORID:10&ie=UTF-8
Read the article on the sadlak website
http://www.sadlak.com/si_rifle_parts_pistons.html