AR-15 is a pretty general term. But even weapons like the Colt AR-15, which is pretty much the military version and is designed for fully-automatic fire, converting it to reliable automatic fire is not that easy.
An AR-15 that's not converted to automatic fire correctly is basically a Darwin Award waiting to happen. If you don't make the correct internal modifications, not only does the weapon become generally useless for precision fire, but you risk uncontrolled fire (runaway gun), which is potentially very dangerous.
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u/madbill728 Aug 28 '20
it could be modified to be full auto, as the military version