5.56x30mm MARS
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The 5.56x30mm MARS was a PDW / Assault Rifle cartridge created by Colt during the development of their experimental Colt MARS ("Mini Assault Rifle System") program.
The 5.56x30mm MARS was a PDW / Assault Rifle cartridge created by Colt during the development of their experimental Colt MARS ("Mini Assault Rifle System") program.