MIL-DTL-12235 Projectile, Plate-Proofing \(For Impact Or Shock Testing\) 37Mm M1000, 57Mm M1001, 75Mm M1002, 90Mm M1003, 105Mm M1004, 20Mm M1005, 57Mm M1001A, And 75Mm M1002AThis specification covers plate-proofing projectiles made from steel and aluminum bar stock for use in impacting or shock-testing armor, armor weldments, and other armor structures \(see 6.1\).