Lock

A lock is an internal part found on most electronic flywheel-powered blasters.

Details
There are usually four locks found in an electronic flywheel blaster, the first lock prevents the flywheels from revving up when the jam door is open, the second lock prevents the firing trigger from being pulled when a dart is not loaded in the clip (although this lock is very uncommon nowadays), the third lock prevents the firing trigger from being pulled when a clip is not inserted, and the fourth prevents the firing trigger from being pulled when the acceleration trigger is not being pulled.

Modification
Many modders choose to remove locks, as this will make testing easier and improves some performance since the firing trigger is able to be pulled all the way.