1. Go to Virtual Arsenal
2. Equip one of the 5.56 rifes such as Spar-16
3. Try the gun out
4. Go to inventory, hover over the magazine, notice the "Used in:" field doesn't include Spar-16.
30Rnd_556x45_Stanag
30Rnd_556x45_Stanag_green
30Rnd_556x45_Stanag_red
30Rnd_556x45_Stanag_Tracer_Red
30Rnd_556x45_Stanag_Tracer_Green
30Rnd_556x45_Stanag_Tracer_Yellow{F37745}