View Larger Image Tenacity Update Defiance is updating the already popular Tenacity line to now come standard with an integral recoil lug. View the Tenacity Action. Defiance Machine Team2024-08-29T12:51:33-06:00December 6, 2019|Product Updates| Share This On Social FacebookXRedditLinkedInTelegramEmail About the Author: Defiance Machine Team Defiance Machine builds precision rifle actions in Columbia Falls, Montana. Every technical article on this site is reviewed by the people who actually machine and build these actions before it goes live. Related Posts