Thanks EDM. That very well may be the issue, but the rear take down pin was not installed at the factory. Mossberg send me a shipping label so it is going back for inspection. Hope they don't have it forever.
I am having a different issue with my 715T flat top. Picked it up about 3 weeks ago and have put about 500 rounds through it with only a couple of FTF issues using a variety of ammo on two sessions (150 first time and +/-250 second time)
My problem is that after our second outing I pulled it...