Bullet-proof lockdown system

A lockdown barrier system comprising:

• a first mount that is secured to a wall surface;
• a sheet of shielding material formed of an anti-ballistic material, the sheet of shielding material being moveable between a retracted position and an extended position, wherein the sheet of shielding material has a first end that is secured to the first mount and a second end opposite the first end that is freely moveable away from the first mount;
• and
• a second mount that is secured to the wall surface at a location that is spaced from the first mount,
• wherein the second end of the sheet of shielding material is releasably connectable to the second mount, the second end being secured proximate to the first mount when in the retracted position, and the second end being secured to the second mount when in the extended position, wherein the sheet of shielding material is wound or rolled when in the retracted position, the sheet of shielding material being unwound or unrolled during movement to the extended position.