As I posted previously, the metal parts can stop a 9mm or less. They do make armored Cybertrucks for civilian service however.
So, as is- kinda sorta bulletproof. It can be modified to be VIP level bulletproof. It is not a military grade armored car or even close.
A CT weighs 6700#. A Ford F-450 Super Duty =8600#. Chevy Suburban= 6000#. In other words, a bit more than a big SUV but not even close to the bigger pickup trucks.