Which part of the firearm is primarily held by the non-trigger hand for support?

The correct answer is the forestock. In firearms, the forestock, also known as the forend or handguard, is the front part of the stock located beneath the barrel. The primary function of the forestock is to provide a stable point for the non-trigger hand to grip while aiming and shooting. This enhances control and accuracy by allowing the shooter to stabilize the firearm against their body or the environment.

When holding a firearm, the shooter uses their non-trigger hand to grip the forestock, which helps manage recoil and maintain a proper shooting position. This grip is essential for effective and safe shooting practices, as it contributes to overall firearm handling and control.

Other options, such as the butt, trigger, and magazine, do serve vital functions, but they are not primarily held by the non-trigger hand for support. The butt is primarily against the shoulder, the trigger is used by the firing hand to discharge the firearm, and the magazine is a component that holds the ammunition but is not gripped during aiming or shooting.