PROTECT-BR3 Bullet Resisting to UL752 Level3

Bullet Resistant Level III

Glassopolis offers a wide range of security glass. Whether your goal is bullet resistance, blast resistance, forced entry protection, windstorm protection or other, we have a solution for you. Let us know what you are looking for. We can help.

Product Detail


Store upright, dry, away from sunlight; protect edges.


Clean with soft cloth and mild cleaner; avoid hard materials on surface.


Install per standards in rated frames; avoid humidity and direct sunlight on film.


  • Quick ship. Get it in days!
  • Does not contain polycarbonate which can discolor, get scratched or de-laminate
  • Features replaceable spall protection film
  • Steel vision lite door kits available
  • Designed for use in similarly rated door and window assemblies


Threat Level Weapon Caliber Test Ammunition Bullet Weight Velocity(Min FPS) Velocity (Max FPS) Velocity MPS Number of Shots
Level 1 9 mm full metal copper jacket with lead core 124 (8.0 g) 1175 1293 358 3
Level 2 .357 Magnum lead jacketed soft point  158 (10.2 g) 1250 1375 381 3
 Level 3 .44 Magum lead semi wadcutter gas checked 240 (15.6g) 1350 1485 411 3


GLASSOPOLIS Protect-BR3™ is a 1-1/2″ (38mm) thick, high-performance bullet-resisting glass, UL 752 Level 3 rated for .44 Magnum protection. Ideal for secure environments, it combines safety with clear visibility and is designed for doors, windows, and more, ensuring top-tier security and spall protection.