Hmmm. The last time I read about the guns in TX, it was estimated there were 2+ for every man woman and child in the state in private ownership. Do you really think that it would be possible for the brown shirts to go door to door and remove them? Not going to happen and TX will not give them up at the state level. Will not happen.
Do you remember Waco? At the time, I commented to a few friends that the Davidian's had about the same number of guns as any random collection an equivalent population of Texans.
Personally, I think that very few LEO's in Texas would be willing to enforce such an order.
Is it "armed insurrection" if the state government is on your side?