The AR-type rifles were first popularized in the 1960s, with a military version of the rifle becoming popular in the 1970s.
Today, the U.S. is home to more than 30,000 licensed gun stores, which sell firearms and ammunition at prices ranging from $500 to $2,500.
The market is not only in flux, but it is changing, too.
Some of the most popular models in recent years, such as the AR-style M4 rifle, are also being banned from sale.
But the industry is struggling.
In a new study, the nonprofit Gunsmithing and Gun Shops Association of Iowa, a gun trade association, and the Iowa Department of Transportation found that sales of the AR type rifles, which were banned by the federal government in 2012, have declined over the past decade.
The researchers found that the number of AR-based weapons sold declined from 4.6 million in 2013 to 2.3 million in 2019.
In the last three years, there have been two major changes to the AR rifle industry.
The first was the arrival of an alternative rifle design called the M4 carbine, which was a cheaper alternative to the M16.
In 2019, the ATF began to restrict the manufacture of AR rifles to AR-platform rifles, as it was determined that the M416 carbine is a better match for modern modern warfare.
The second change has been the rise of the M-1 carbine.
The M-2 carbine uses a modified version of a M16 rifle and features a pistol grip instead of a gas block.
The carbine has been available in rifles and shotguns since 2008.
The AR- and AR–platform guns are used by thousands of people in the U