A package of 11 gun-control bills advanced through the state Capitol this week, days following the country's largest mass casualty shooting in modern history.

Those bills were introduced by state lawmakers at the beginning of the year, after a mass shooting in San Bernardino on December 2 left 14 people dead.

Following the Orlando massacre, state Sen. Leader Kevin de Leon tweeted Monday:

There are logical steps we can take to prevent highly destructive weapons from getting into wrong hands & responsible way to do it.

Here's a breakdown of the 11 gun-control bills moving through the state Legislature:

AB 1176: Would make the theft of a firearm a felony, grand theft crime. This previously was state law, but 2014's voter initiative Prop. 47 reduced the penalties for theft crimes of less than $950 from felonies to misdemeanors. Though Prop. 47 supporters say this was not the intent of the initiative, an appellate court decided otherwise in a case called People vs. Perkins.

AB 1664: Aims to close the so-called "bullet button loophole" by redefining what constitutes as a detachable magazine. The new definition: "an ammunition feeding device that can be removed readily from the firearm without disassembly of the firearm action, including an ammunition feeding device that can be removed readily from the firearm with the use of a tool." Those guns, even if previously purchased, would need to be registered with the government. Gov. Jerry Brown vetoed similar legislation in 2013 due to the "infringement on gun owner's rights"

AB 1673: Expands the definition of a firearm to include "unfinished frames and receivers" that can be easily converted. The author says the intent is to "close a dangerous loophole that allows anyone to sell, trade and manufacture in partial-completion the only part of a firearm that is subject to serial-number." Opponents argue the new definition is too vague and might prompt arrests of people simply carrying a piece of metal or plastic.

AB 1674: Long guns would be included in California's one gun purchase per 30-day period rule.

AB 1695: Makes filing a false stolen firearm report a misdemeanor crime resulting in a 10-year prohibition on firearm possession.

AB 2607: Expands who can petition a court for a gun violence restraining order (GVRO) beyond immediate family members or law enforcement officers. It would allow an employer, a coworker, a mental health worker who has seen a person as a patient in the prior six months, an employee of a secondary or postsecondary school that a person has attended in the last six months to also petition for a GVRO.

SB 880: Does roughly the same thing as AB 1664 -- redefines "assault weapon" to include semi-automatic firearms that have bullet-buttons.

SB 894: Firearm owners must report a theft or loss of their gun(s) to local law enforcement within five days. Existing law only requires manufacturers or sellers to report any loss or theft within 48 hours. Gov. Brown has twice previously vetoed similar legislation because he does not believe it would help reduce gun trafficking.

SB 1235: Requires the state Department of Justice to track information on ammunition sales and vendor license information, which includes a background check.

SB 1407: A person who wants to manufacture or assemble a firearm would first need to apply to the California Department of Justice for a unique serial number or other identifying mark. The derpartment would be allowed to charge a fee in order to cover the cost of creating unique markers. Violating this provision would be a misdemeanor crime.

SB 1446: With certain exemptions (including for retired peace or federal officers) this would prohibit the possession of any ammunition feeding device with the capacity to accept more than 10 rounds -- California's definition for large-capacity magazine.