North American Bullet Proof fabricates an entire line of steel bullet resistant doors as an accompaniment to our WDR series doors. The SDR doors are offered in protection levels U.L. 1 through 8. We have also provided doors in custom configurations and performance levels up to and including .50 calibers and 30.06 armor piercing. Our SDR Series doors are also built with minimum 12 Ga. Faces and tubular steel internal framework. These heavy-duty doors are more than just bullet resistant. They have secure forced entry characteristics compared to “hollow metal” bullet resistant doors. The SDR Doors are ideal for applications where ballistic integrity, containment and durability is a requirement. If only handgun bullet resistance is your goal perhaps our HMDR door would be a lower cost alternative.