For the last couple years, they have been lasering their name on their uppers. See below. However, prior to that, they just went with the cross. Used to be you could also tell what began life as a separate upper and lower vs a complete rifle by the fact that they would stamp the cross between the upper and lower on a complete rifle. Don't know if that still holds true.

I'd second the vote on calling and asking Sheri real nicely.