Bulletproof level settings in GA293-2012 "Police Bulletproof Helmets and Face Shields":
Level 1: Protection against penetration of 1964-style 7.62mm pistol rounds (lead core) fired from domestic 1964-style or 1977-style 7.62mm pistols.
Level 2: Anti-penetration of the 1951-style 7.62mm pistol (lead core) fired by the domestic 1954-style pistol.
