[Flatlander]

Yep, it's an electrical safety (besides the mechanical one) that G&P took out. I explained this recently (on a local forum) to someone else so I'll just copy/paste what I already wrote:

The G&P switch assembly and selector plate is also unique. The switch assembly doesn't have those "finger prongs". The selector plate also is doesn't have the copper plate on it near the front. That system is an electrical safety to compliment the mechanical one - the selector plate's copper strip must be positioned over top of the 2 finger prongs to complete the circuit. On a normal AEG, when the selector is in the SAFE position the selector plate's copper strip is not contacting these prongs so if the mechanical safety were to fail the gun still would not fire. G&P just simplified things and took that electircal safety out - good idea from a mechanical/reliability standpoint.