While most AR-15s are built with .223 or 5.56 barrels, an alternative is a 7.62×39 AR barrel. The 7.62×39 cartridge was developed by the Soviet Union in 1943 and used in weapons like the SKS, RPD, AK-47, and RPK.
While this round is not as accurate as other cartridges, it does have its purpose in modern weaponry. We dove into the best 7.62×39 AR barrels to separate the wheat from the chaff. This article is part of our ongoing Guide to Everything AR.