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The VPAM scale as of 2009 runs from 1 to 14, with 1-5 being soft armor, and 6-14 being hard armor. [1] Tested armor must withstand three hits, spaced 120 mm (4.7 inches) apart, of the designated test threat with no more than 25 mm (0.98 inches) of back-face deformation in order to pass.
SAPI plates meant for body armor come in front and back plates which are identical, and smaller side plates. The front and back plates come in five sizes. Their dimensions are the following: [1] [13] Front and back SAPI plates: Extra Small - 1.27 kg (2.8 lb) | 184 x 292 mm (7¼ x 11½ in) Small - 1.59 kg (3.5 lb) | 222 x 298 mm (8¾ x 11¾ in)
Originally the entire IBA system weighed 16.4 pounds (7.4 kg), [5] with the large vest weighing 8.4 pounds (3.8 kg), [6] and two plate inserts weighing 4 pounds (1.8 kg) each. This is much lighter than the previous Ranger Body Armor fielded in Somalia which weighed 25.1 pounds (11.4 kg), as well as the PASGT/ISAPO combination, which weighed ...
Comparing medium-sized plates, a SAPI plate weighs 1.82 kg (4.0 lb) while an E-SAPI plate weighs 2.5 kg (5.5 lb), over a 35 percent increase in weight. [15] In regards to cost, E-SAPI plates cost 50 percent more, coming in at approximately $600 per plate. [16] SAPI plates were largely phased out in favor of E-SAPI plates beginning in 2005.
The approximate weight for one NIJ Level III ceramic armor plate is 4.4 to 8 pounds (2.0 to 3.6 kg) for the typical size of 10 by 12 inches (25 by 30 cm). There are other types of plates that come in different sizes and offer different levels of protection.
There was a 150-year period in which better and more metallurgically advanced steel armor was being used, precisely because of the danger posed by the gun. Hence, guns and cavalry in plate armor were "threat and remedy" together on the battlefield for almost 400 years. By the 15th-century, Italian armor plates were almost always made of steel. [12]
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