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Body Armour Protection levels as approved by the Home Office
 
Stab protection levels
 
Anti-stab      Protects from stab threats from larger cross-sectional blades.
 
KR1
Performance Levels          
Energy level 1 (joules)     24
                                                            Maximum Penetration     7mm
                                                            Energy level 2 (joules)      36
                                                            Maximum Penetration     20mm*
                       
KR1+SP1       Protects against – Knives, Slashing and Spiked Weapons.
 
The lowest protection level allowed and is tested at a performance level of 24 joules of energy. It should offer maximum periods of wear in low risk environment. Armour tested to this level would be suitable for covert use.
 
Performance Levels                                               KR1                 SP1
Energy level 1 (joules)     24                   24
                                                            Maximum Penetration     7mm              0mm*
                                                            Energy level 2 (joules)     36                   N/A
                                                            Maximum Penetration     20mm*           N/A
 
KR2
Performance Levels
                                                 Energy level 1 (joules)     33
                                                           Maximum Penetration     7mm
                                                           Energy level 2 (joules)     50
                                                           Maximum Penetration     20mm*
 
KR2+SP2       Protects against – Knives, Slashing and Spiked Weapons in a high risk environment.
 
A medium protection level, tested at a performance of 33 joules. This should provide a general duty garment for extended wear and may be covert or overt.
 
Performance Levels                                               KR2                 SP2
Energy level 1 (joules)     33                   33
                                                            Maximum Penetration     7mm              0mm*
                                                            Energy level 2 (joules)     50                   N/A
                                                            Maximum Penetration     20mm*           N/A
 
KR3
Performance Levels          
Energy level 1 (joules)     43
                                                            Maximum Penetration     7mm
                                                            Energy level 2 (joules)     65
                                                            Maximum Penetration     20mm*
 
KR3+SP3       Protects against – Knives, Slashing and Spiked Weapons in an extreme risk environment.
 
A high protection level tested at a performance of 43 joules. This would be suitable for short periods of wear in high-risk situations. Armour manufactured to this level would normally be overt.
 
Performance Levels                                               KR3                 SP3
Energy level 1 (joules)     43                   43
                                                            Maximum Penetration     7mm               0mm*
                                                            Energy level 2 (joules)     65                   N/A
                                                            Maximum Penetration     20mm*           N/A
 
* One Penetration not exceeding 30mm is permissible at E2 knife testing and one penetration (no depth limit) is permissible for spike testing.
 
 
 Ballistic protection levels
 
HG1/A           Lightweight-flexible soft armour. Suitable for both overt and covert use.
 
Performance levels 
Calibre –                   9mm              0.357” Magnum
Bullet Mass                8.0g                 10.2g
                                                  Range (min)m           5                       5
                                                 *UPL (mm)                 44                     44
                                                  Velocity(m/s)            365±10            390±10
 
HG1                General Duty soft armour for low risk situations. May be overt or covert.
 
Performance levels 
Calibre –                   9mm              0.357” Magnum
Bullet Mass                8.0g                 10.2g
                                                            Range (min)m            5                       5
                                                  *UPL (mm)                 25                    25
                                                  Velocity(m/s)             365±10           390±10
 
HG2                Special duty soft armour intended for use in firearms operations
 
Performance levels 
Calibre –                   9mm              0.357” Magnum
Bullet Mass                8.0g                 10.2g
                                                            Range (min)m           5                       5
                                                  *UPL (mm)                44                     44
                                                  Velocity(m/s)             430±10           455±10
 
  
HG3                Heavy duty armour intended for use in firearms operations. Can be used in conjunction with RF and SG plates
 
Performance levels 
Calibre –                   Carbine
Bullet Mass               4.01g            
                                                            Range (min)m          10                  
                                                  *UPL (mm)                25                  
                                                  Velocity(m/s)            750±15        
 
 
SG1                Offers protection from full-length shotguns at close range. Usually used in conjunction with HG2 armour.
 
Performance levels 
Calibre –                   Shotgun 12 gauge
Bullet Mass               28.4g            
                                                            Range (min)m          10
                                                  **BFS(mm)               25
                                                  Velocity(m/s)            435±25
 
RF1                 Offers protection against soft-core ammunition fired from rifles. Usually used in conjunction with HG2 armour.
 
Performance levels 
Calibre –                   Rifle
Bullet Mass               9.3g
                                                            Range (min)m          10
                                                  **BFS (mm)              25
                                                  Velocity(m/s)            830±15        
 
All of the above protection levels can be combined to offer dual stab and ballistic protection.
 
*UPL – Upper Predicition Limit
**BFS – Back Face Signature

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