Can you answer my Airsoft questions?

the front railing will hold the red dot. i don't know about the scope but my MP5 navy has a railing to hold a scope with red dot. nevertheles the front side railing can hold a flashlight and or red dot if theres no top railing for a scope. about pistols, we enjoy the gas powered more than the electric because it simulates the real thing especially for CQB games. have fun and keep safe