The terms may be confusing to some people, but semi-auto and full-auto firearms are very different from each other.

What is the difference between a semi-automatic and a fully automatic firearm?

Semi-automatic means that once you have a round in the firing chamber, when you pull the trigger, that round will fire. It’s referred to as “semi-automatic” because the next round will automatically cycle into the chamber from either an internal or external magazine.

Fully automatic means that once a round is loaded into the chamber, if you pull and hold the trigger, the firearm will continue to fire until you let go of the trigger or run out of ammunition. Fully automatic firearms are sometimes called “machine guns.”

Can I buy a semi-automatic rifle?

Semi-auto rifles are commercially available in a variety of makes, models, and calibers at thousands of gun and sporting stores. In most cases, a person can buy an AR-15 in the same manner as buying a handgun.

Is an AR-15 an automatic rifle or “assault rifle”?

No, “AR” stands for ArmaLite Rifle after the company that first developed the firearm 60 years ago. ArmaLite sold the rights to Colt, which modified the rifle and sold it to the military as the M-16. The M-16 can be fully automatic, but an AR-15 is only semi-automatic.

The term “assault rifle” is technically referring to military rifles, which have a switch on the side that allows the user to select semi-automatic, fully automatic, or three-shot burst.  These rifles have not been used in mass shootings; semi-automatic rifles were used in the shootings in Orlando, Newtown, and San Bernardino.

How many bullets are shot from a semi-automatic firearm per second?

The user can shoot as fast as his or her finger can press the trigger. One trigger pull = One bullet fired.

Can I buy a full-auto weapon?

Not likely. Fully automatic firearms are available only to the military or law enforcement. The only automatic weapons legal to purchase for civilians in the United States are the ones that have been registered between 1934 and 1986. Taking possession of them requires paying a $200 federal transfer tax, filling out an application to register the weapon, submitting passport photos, getting your chief law enforcement official to sign your application, and submitting to an FBI background and fingerprint check; or obtaining an NFA Trust, which has different requirements. Those firearms (and specialized kits to convert semi-autos to full-autos) are difficult to obtain and very expensive.


A Girl and a Gun
A Girl & A Gun Women’s Shooting League (AG & AG) is a shooting club established by women shooters for women shooters. AG & AG events are intended to be fun, social gatherings where women can come together for support, encouragement, ask questions in a safe and nonjudgmental environment, improve on their marksmanship, and bond together in the shooting community.