The basic "Level 3" SAPI plates are 25.4x305cm (10x12 inches) and weigh 2.1 kg (4.6 pounds) each. For greater protection the older Level 4 SAPI plates, weighing about 2.9 kg (6.4 pounds) each, could ...

December 17, 2007: The U.S. Army and Marines are in the process of replacing existing SAPI (Small arms protective inserts) ceramic bulletproof plates for protective vests, with thicker, but not much ...