Generally, a telescopic one. Like a scope on a Sniper rifle
it makes the gun moire accurate when you are not aiming down the sight
Both can be equally accurate
No. It does not have any rails, nor is it accurate enough to need one.
Depends on the target. Generally, but not always, a telescopic sight.
Blue Book of Gun Values
Super soaker 8000
The question can't be answered as written.
How do you sight a power line 880 bb gun?
AIM B Style Red Dot Gun Sight-wrong your barrel
Unless you have a higher priced or accurate gun, buy high end bb's and take the time to sight it in properly, a red dot or any optics does not do much for the gun.
Yes, a front and a rear sight.