[Centurion2000]

Isn’t a .50 cal illegal to use on humans according to UN international law?

Laws of Land Warfare and the Geneva Convention.

[xone]

Isn’t a .50 cal illegal to use on humans according to UN international law?

Laws of Land Warfare and the Geneva Convention.

Untrue as evidenced by fielding .50 cal sniper rifles.

AFI 51-402

Due to certain target effects of the Mk211, the Army is also working on a match grade .50-caliber ball ammunition specialized antipersonnel round for the XM107, designated as the XM1022 long range tactical sniper cartridge. The idea is to match the ballistics of the Mk211 in the new XM1022 round.

M2 Ball In marksmanship training, against personnel, and light materiel targets.