He’s intentionally trying to see what the AR can endure before it starts to have problems.
Eric, from Moss Pawn & Gun, attempts to burn out an AR-15 upper on an M16 lower. There are several specific products being used including: SRC Relia-Bolt BCG, Geissele Super Gas Block and an AR barrel from Faxon Firearms.
There are so many things that can go wrong. Gas tubes are designed to fail before the firearm will be destroyed. Watch the video to find out what happens, you won’t be disappointed!