AR-15SP1 said:The M.S.A.R. model STG-556 which takes a proprietary AUG style clear mags, but not interchangeable with Steyr AUG, are scheduled to be released sometime this month.
They're testing and evaluating their rifle now but there's no word on how the test are going, if they find any problems that's going to delay the release date for sure.
The other US made AUG which is Tactical Products Design (TPD) model AXR that takes M16/ AR-15 mags are scheduled to be released mid June of this year and they said that they're on schedule so far.
Here's a link for more info of both US AUG rifles in the Black Rifle Room forum of this same site.