AR-15 Ammo Not “Armor Piercing” According to Law, But ATF Banning It Anyway kit Posted on February 26, 2015 Posted in Aggregated No Comments Tagged with Featured Stories, Tile Kit Daniels | M855 NOT “armor piercing” due to lead core, according to 18 U.S.C. 921 (a)(17)(B). Share this:Share Share on Facebook (Opens in new window) Facebook Share on Reddit (Opens in new window) Reddit Share on X (Opens in new window) X Share on LinkedIn (Opens in new window) LinkedIn Email a link to a friend (Opens in new window) Email