The .50 cal Barret could easily be lumped in with the so called anti tank rifle given that the round is heavy, powerful and can punch through armor. Technically so could any battle rifle with AP ammo. It's bogus and another BS situation but it could qualify just like the "Boys Anti Tank Rifle" did.
If a .50 cal could destroy tanks we wouldn't need Dragons, Hellfires, LAW's, TOW's, RPG's, DPICM, 105 mm, 120 mm guns since we could do it far cheaper and lighter with a.50 cal.
Sticking a name on something to vilify it like sniper rifle for any scoped rifle, or assault rifle because it has a pistol grip and or a "flash hider" is getting rather old. This bit about anti tank rifle is more of the same old drivel.