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Level 4 tests the caliber 14.5x114mm with special ammunition. By the way, API stands for “armor-piercing incendiary.” Level 3 covers rifles with calibers of 7.62x51mm and 7.62x54 R, each with special hard-core and hard-core incendiary ammunition. The next protection class, level 2, defines materials that withstand 7.62x39mm caliber weapons with hard-core incendiary (API) ammunition – which, to put it simply, corresponds to the Kalashnikov AK47 with hard-core incendiary ammunition. Starting with level 1, the lowest resistance class: it indicates resistance to rifles ranging from 5.56x45mm caliber up to 7.62x51mm caliber assault rifles. The NATO standard Stanag regulates five resistance or firing classes. Level 5 represents resistance to the sniper rifle Dragunov, 7.62x54mm caliber, with two different ammunition types. Resistance to both weapons corresponds with level 4 of the Russian GOST norm. More precisely the AK47, 7.62x39mm caliber, as well as its further developed variant, the AK74, 5.45x39mm caliber. Of course, the Russian standard also covers a weapon that originated in the country and is particularly widespread: the Kalashnikov. The following table gives only a rough overview of the Russian GOST norm and the corresponding bullet-resistance classes for bullet proof glass. By the way, the designations in the GOST ballistic standard can be misleading, which is why it is advisable to seek our advice. The bullet weights range from approximately 3 to over 48 grams. In addition, the norm distinguishes between “standard ammunition” and “special ammunition,” which usually contains hardened cores (hard-core projectiles).ĭepending on the firing class, the various weapon systems are fired at a distance of five to 50 meters from the bullet-resistant glass. Starting with 9x18mm caliber pistols and ranging up to the 12.7x108mm caliber military weapons. GOST differentiates between seven resistance or bulletproof classes. Compliance requires testing with weapons and ammunition that are currently a concern in Russia, and these are naturally different from the European norm for bulletproof materials, EN 1063. GOST is the Russian standard for bulletproof materials. SCP1 Soft-centre (lead) with steel penetrator (type SS109) HC1 Steel hard core, mass 3.7 g +/-0.1 g, Hardness larger than 63 HCR Ballistic classes for bullet resistant Glass in accordance with EN 1063 Resis