Levels of Restraint
There are four levels of restraint or retention.
- Level 1 holsters keep the gun in the holster through friction only.
- Level 2 holsters use friction plus an additional restraint. This restraint could be a thumb strap, a flip-up strap, an automatic lock, or some other device.
- Level 3 holsters use friction plus two additional restraints.
- Level 4 holsters use friction plus three additional restraints. However, it is unlikely that a civilian would need this level of restraint.