Slang term for the 7.62x51mm NATO rifle cartridge. NATO 7 is not for use with gun nuts, as they will freak out like a coke head given powdered sugar as a present.
by Nikolas Glock November 04, 2009
Slang term for the 5.56x45mm NATO rifle cartridge. Do not use the term NATO 5 with fanatics, it's just not smart.
by Nikolas Glock November 04, 2009