They inlet for the Ruckus, which I do believe has the same footprint inlet wise as a tenacity. I ordered one for my new ARC archimedes build. Talked to John Kyle prior to order. He said the mausingfield inlet is the same so I ordered it up. Took 5 weeks to get in the custom black color. The bottom inlet to the action and recoil lug is great. However the ejection port cut isnt the same, has stock overhanging the action at the port, that crap bugs me. Doesn't affect ejection, but its unsightly, especially on a 1350$ stock.