Republican lawmakers and gun rights groups blasted the Biden administration over a new rule that tightens regulations on pistol stabilizing braces. The Bureau of Alcohol, Firearms, Tobacco and Explosives (ATF) finalized a new regulation Friday that will treat guns with stabilizing accessories like short-barreled rifles, which require a federal license to own under the National Firearms Act. The move is part of a comprehensive gun crime strategy President Biden announced in April 2021, in response to the massacre at a grocery store in Boulder, Colorado, where a gunman using a stabilizing brace killed 10 people. A stabilizing brace was also...