The first official confirmation that Remington plans to expand to Huntsville, Alabama comes from Sen. Jeff Sessions (R-AL). Prior to this, all reports have had to say that "an announcement is expected" because "high level sources" "have confirmed it". I sincerely doubt a senator would make such a release unless it was a done deal.
From Sessions' Senate homepage:
WASHINGTON—U.S. Sen. Jeff Sessions (R-AL) issued the following statement today after Remington Arms announced plans to open a plant in Huntsville:
"Remington's decision is great news and a further testament to the world class workforce in Huntsville. This plant will create good-paying manufacturing jobs for thousands of workers. We warmly welcome Remington Arms and look forward to their success and presence for years to come."
While Gov. Robert Bentley (R-AL) did allude to it when asked, all he said was "I think Monday you'll see something very special in the state." That is a lot more nebulous than Sessions' comment.