From school security to red flag laws, here's what's being proposed in the bipartisan gun safety package that some GOP lawmakers have vowed to vote against

A bipartisan group of 20 senators on Sunday announced a proposal for a comprehensive package aimed at tackling gun violence.

The "commonsense, bipartisan proposal" would protect America's children, keep our schools safe, and reduce the threat of violence across our country, according to a statement by the senators.

The senators said that their plan saves lives and protects the rights of law-abiding Americans.

The agreement would be the most significant gun safety legislation to pass Congress in decades according to President Joe Biden.

Democrats initially wanted a comprehensive package on gun reform. Some Republican lawmakers will vote against it or condemn their colleagues who support it, but others are willing to review the bill.

There is a final piece of legislation that has not been drafted.

Support for red flags laws

Red flag laws include providing resources to states and tribal nations. Red flag laws allow courts to authorize law enforcement to temporarily seize a person's gun if a judge determines they pose an immediate threat.

A potentially dangerous person could be flagged to authorities by a friend. Some states have red flag laws.

Investment in mental health services and telehealth

The lawmakers plan to invest in mental health and suicide prevention programs. Investments in mental health services for children and their families are included in the proposal.

Closing the 'boyfriend loophole'

The National Instant Criminal Background Check System, or NICS, should be expanded to include people who have been convicted of domestic violence, according to a proposal by the senators.

The "boyfriend loophole" allows convicted domestic abusers to buy firearms if they were married to, shared a child with, or lived with the victim.

Funding for school security

Since the school shooting in Uvalde, Texas, the goal of providing funding to programs aimed at preventing school shootings, training students and staff, and improving school security has become more popular with Republicans.

Cracking down on illegal gun dealers and straw purchases

Ensuring all commercial sellers complete background checks and clarifying who needs to register as a federal firearms dealer are included in the proposal.

It wants to prevent the flow of illegal guns into cities by cracking down on gun traffickers and straw purchasing, which is when someone buys a firearm on behalf of another who is unable to buy it himself.

Expanding background checks for buyers who are under 21

The senators want to make it harder for people under the age of 21 to buy guns. The review process would take additional time and include checking juvenile and mental health records.