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Navy and Marine Corps are dropping some money on barrier-penetrating 5.56 mm ammo
The new ammo can penetrate some barriers like auto windshields and doors.
By Shawn Snow
Latest "5.56 mm" stories
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The Army’s SAW and M4 replacements will both fire this more accurate and deadly round
The new round will put soldier ranges out to 600 meters, twice as far as the effective range of the M4.
By Todd South