Used, Great condition! These plates were made by Armor shield ltd. in the late 1990s for the British Army to use in Northern Ireland. Level 4 Protection!
BALLISTIC LEVELS
Bullet proof vests are designed to ‘trap’ and slow bullets down as they attempt to pass through the vest. Bullet Proof Vests come in two different types; hard and soft. The ‘soft’ armors are designed to protect against most handgun and small arms ammunition, whereas ‘hard’ armors are designed to stop high caliber and armor piercing rounds. The NIJ classifies all armors in the following levels:
NIJ LEVELS BALLISTIC TABLES
|
|
NIJ Level IIa |
NIJ Level II |
NIJ Level IIIa |
NIJ Level III |
NIJ Level IV |
Areal Density |
3.5 kg/m |
4.2 kg/m |
5.9 kg/m |
25.9 kg/m |
32.5 kg/m |
|
|
Thickness |
4mm |
5mm |
6mm |
15mm |
20mm |
.9mm |
x |
x |
x |
x |
x |
|
.44 Magnum |
x |
x |
x |
|||
5.56mm |
x |
x |
||||
7.62mm NATO |
x |
x |
||||
.30 Armour Piercing (M2 AP) |
x |
Edged Blade Levels
While the NIJ is considered the world standard for ballistics testing, stab-proof vests are standardised by the CAST. Many assume that if a piece of body armor can stop a bullet, it can stop a knife. This is not the case however, and stab proof vests are different in make up to bullet proof vests. It is possible to find multi-threat vests that can protect against both, but these still need to be graded according to the protection they offer against both bullets and edged/spiked weapons. The threat levels for stab proof vests are standardised by the CAST as follows:
KR1 | KR2 | |||
Knife Resistant Level 1 | Knife Resistant Level 2 | |||
Energy Level | E1 | E2 | E1 | E2 |
Energy (joules) | 24 | 36 | 33 | 50 |
Velocity | 5 m/sec | 6.2 m/sec | 5.9 m/sec | 7.3 m/sec |
Total Missile Mass | 1.9 kg | 1.9 kg | 1.9 kg | 1.9 kg |
Maximum Penetration | 7mm | 20mm | 7mm | 20mm |
SPIKED WEAPON LEVELS
There is also spike protection to be considered, which was first introduced into CAST’s standards to address the additional threat faced by Prison Officers. Spike protection can be added to stab and ballistic vests, neither of which will ordinarily protect against spiked weapons. CAST will only certify spike protection in addition to stab protection. The threat levels for spike proof vests are standardised by the CAST as follows:
KR1 & SP1 | KR2 & SP2 | |||
Knife Resistant Level 1 & Spike Protection Level 1 | Knife Resistant Level 2 & Spike Protection Level 2 | |||
Energy Level | E1 | E2 | E1 | E2 |
Energy (joules) | 24 | N/A | 33 | N/A |
Velocity | 5.0 m/sec | N/A | 5.9 m/sec | N/A |
Total Missile Mass | 1.9 kg | N/A | 1.9 kg | N/A |
Maximum Penetration | KR1=7mm, SP1=0mm | N/A | KR2=7mm, SP2=0mm | N/A |