Sen. Dianne Feinstein introduced legislation Wednesday&nbsp;to ban the sale and possession of military style assault weapons. The push comes after two mass shootings in six weeks, including a shooting at a church in Texas on Sunday that killed 26 people.Feinstein indicated she knows the bill has little chance of moving in the&nbsp;Republican-controlled Senate. It is co-sponsored by 22 Democrats, including Feinstein's fellow California&nbsp;Sen. Kamala Harris.Feinstein&nbsp;said in a statement that&nbsp;she introduced the bill&nbsp;so &ldquo;the American people will know that a tool to reduce these massacres is sitting in the Senate, ready for debate and a vote."Feinstein authored the original assault weapons ban that was passed&nbsp;in 1994, but Congress did not reauthorize it and the ban ended in 2004.&ldquo;After each shooting, we&rsquo;re told it&rsquo;s not the right time to act. We&rsquo;re told to respect the victims by sitting on our hands," Feinstein said. "To those who say now isn&rsquo;t the time, they&rsquo;re right &mdash; we should have extended the original ban 13 years ago, before hundreds more Americans were murdered with these weapons of war. To my colleagues in Congress, I say do your job."The bill would ban the sale, manufacture and importation of 205 military-style assault weapons, including the AR-15 used in several recent mass shootings.It also bans any assault weapon with a detachable ammunition magazine and military characteristics. It exempts certain guns typically used for hunting or recreation, and would&nbsp;allow people to keep banned weapons they already have.The bill also bans bump-fire stocks and other devices that allow semi-automatic weapons to fire at fully automatic rates, something Feinstein spoke out for after 59 people were killed&nbsp;and more than 500 were injured&nbsp;in the&nbsp;recent Las Vegas shooting.