Bulletproof Supply Store header logo
more images

Bulletproof Backpack Insert | Level 3A, 3 and 4 Options

Read Reviews

Why Atomic Defense has the Best Bulletproof Backpack Inserts

An economical way to add a bulletproof plate to any backpack without drawing attention. Atomic Defense’s bulletproof backpack armor serves as a benchmark that stops more bullets with less deformation and goes above the National Standard from NIJ. The competitors’ level III will only stop basic AK-47 bullets while Atomic stops AK-47 and the AR-15s most common bullets.

Check PriceAtomic Defense Payments


Choosing Level IIIa (3A), III (3), Or IV (4)
Armor Inserts For Your Backpack


  • Stops almost any pistol ammunition.

  • Extremely lightweight.

  • Recommended for ages 3+

  • Thin and flexible.

  • Easy to hide.

  • Sealed in waterproof bag.

  • Long lifespan and easy to take care of.

  • Can take countless bullets around the armor.

  • Built-in trauma pad to further reduce felt impact from bullets.


  • Unable to stop rifle (IE, AR-15 and AK-47) by itself.

  • Thin and flexible.


  • Stops the most common rifles (IE, AR-15 and AK-47) by itself.

  • Best middle ground with lightweight performance.

  • Recommended for ages 7+.

  • Offered in a 22% lighter weight or standard ceramic option.

  • Less than 1 inch thick.

  • Able to stop armor piercing bullets from most pistols.

  • Can stop multiple bullets.

  • Lightweight variant floats in water acting as a life-preserver.

  • The highest rating we recommend for children’s backpacks.


  • Heavier than IIIA armor.

  • 2x thicker than level IIIA armor.

  • Unable to stop armor piercing bullets from rifles.

  • Not flexible.


  • Stops just about everything up to 30-06 M2 AP.

  • Less than 1 inch thick.

  • Beats the industry “1 bullet to plate center” by stopping multiple bullets around the plate.


  • About 30% heavier than our level III armor plate.

  • 2x thicker than level IIIA armor.

  • Recommended for ages 15+.

  • Often too heavy for kids’ backpacks.

  • Not flexible.

To find the right size armor plate for you, start by measuring the pocket or area that you would like the plate to fit in with a tape measure or ruler. Make sure to measure the length, width, and height. Typically, our 11×14 inch insert will work best in adult bags, and the 10×12 inch will work best in children’s backpacks.

Understanding The Weights Of Different Ratings. Higher Level Armor Isn't Always Better.

  • Level 4 (IV): Approximately 6.5 to 9 pounds – about the weight of a laptop or a gallon of milk.

  • Level 3 (III): Approximately 5 to 6 pounds – about the weight of a jacket or a small laptop.

  • Level 3 Lightweight (III Lightweight): Approximately 4 to 5 pounds – about the weight your boots.

  • Level 3A (IIIA): Between 1 and 1.5 pounds, about the weight of a plastic water bottle or a 70-page notebook.

Check Price

Ballistic Resistance of Bulletproof Plates by Caliber and Weapon Type

Ballistic-Resistance-of-Bulletproof-Plates-by-Caliber-and-Weapon-Type-MGP-R05Check Price
page divider