WASHINGTON – The National Rifle Association is using a Justice Department memo it obtained to argue in ads that the Obama administration believes its gun control plans won’t work unless the government seizes firearms and requires national gun registration – ideas the White House has not proposed and does not support.

The NRA’s assertion and its obtaining of the memo in the first place underscore the no-holds-barred battle under way as Washington’s fight over gun restrictions heats up.

The memo, under the name of one of the Justice Department’s leading crime researchers, critiques the effectiveness of gun control proposals, including some of President Barack Obama’s. A Justice Department official called the memo an unfinished review of gun violence research and said it does not represent administration policy.