A ban on assault weapons will not be included in a gun control measure set to go to the Senate floor next month. The decision was made by Senate Majority Leader Harry Reid, D-Nev.,Tuesday.

The ban was one of four measures approved in recent weeks by the Senate Judiciary Committee.

One bill proposed barring assault weapons and high capacity magazines; the others pushed for the expansion of required federal background checks for firearms buyers, increase federal penalties for illegal gun trafficking, and boost school safety money.

Since the ban won't be included in the full measure it will likely be added as an amendment, which will be voted on separately, according to Sen. Dianne Feinstein, D-Calif., the sponsor of the ban.

Feinstein said she needs at least 60 votes from the 100-member Senate to prevail, but she faces opposition from some moderate Democrats and Republicans that all but guarantees it will fail to become law.

"I very much regret it," Feinstein, D-Calif., told reporters of Reid's decision. "I tried my best."