The U.S. Army's chief of staff said on Oct. 8, 2018, that its 6.8mm, next-generation weapons, slated to replace the M249 squad automatic weapon and the M4A1 carbine, will be able to penetrate any body armor on the battlefield.
"It will fire at speeds that far exceed the velocity of bullets today, and it will penetrate any existing or known ... body armor that's out there," Gen. Mark Milley told Military.com at the 2018 Association of the United States Army's Annual Meeting and Exposition. "What I have seen so far from the engineers and the folks that put these things together, this is entirely technologically possible. ... It's a very good weapon."