I thought of an idea recently. Since AR barrels are already threaded to accept parts such as a supressor or muzzle break, then why not a barrel extension to increase barrel length without having to remove the entire barrel and install a new one (which would also cost much more). If a person had a 16" barrel and wanted a 20" one, they could buy a 4" extension and simply thread it on to the existing barrel. If they wanted a 24" barrel, then they'd buy a 6" extension. Why isn't there something like this already?
BTW, I googled "ar15 barrel extension" and it came up with something completely different than what I'm describing.
BTW, I googled "ar15 barrel extension" and it came up with something completely different than what I'm describing.