Source: UL 752 Standards Chart - ARMAT , Panel Built Chart , and Delta Scientific .
While the 12th edition is the current official standard, many manufacturers still reference the 11th edition legacy levels (1–10) during the industry transition. UL 752, NIJ & ASTM: Bullet-Resistant Glass Standards 2026 ul 752 standard pdf new
The biggest change is the shift away from a simple 1-10 level hierarchy. The old 11th edition implied that a higher number meant better protection, but this wasn't always true in practice. Source: UL 752 Standards Chart - ARMAT ,
If you're looking for a specific PDF version of the UL 752 standard, I recommend searching on the UL website or other authorized standards distributors. Panel Built Chart