Re: AR15 barrel ?
Short barreled rifle (SBR) is a legal designation in the United States, referring to a shoulder-fired, rifled firearm with a barrel length of less than 16 inches (40.6 cm) or overall length of less than 26 inches (66.0 cm). In the United States, an SBR is an item regulated by the Bureau of Alcohol, Tobacco, Firearms and Explosives (BATFE) as an NFA firearm. In the absence of local laws prohibiting ownership, American civilians may own an SBR provided it is registered with the BATFE, and a $200 tax is paid prior to taking possession of or creating the firearm.