WASHINGTON – Despite fresh opposition from the National Rifle Association, the Obama administration is assembling proposals to curb gun violence that would include a ban on sales of assault weapons, limits on high-capacity ammunition magazines and universal background checks for gun buyers.

Sketching out details of the plan Thursday, Vice President Joe Biden said he would give President Barack Obama a set of recommendations by Tuesday.

The NRA, one of the pro-gun groups that met with Biden during the day, rejected the effort to limit ammunition and dug in on its opposition to an assault weapons ban, which Obama has previously said he will propose to Congress.