Piper's Precision M134 minigun.
The most expensive.
In excess of 8K
Self protection? As in keeping robbers away from your house? I guess i would go with a gas rifle. They are often the most powerful, but are more expensive. If your are looking for home security, an airsoft gun would not be your best bet. I would go with an actual pellet gun or air rifle. Airsoft guns are more for recreation.
Most states follow the Federal guidelines for Airsoft - You must be 18 or over to purchase and own an Airsoft gun. Persons under the age of 18 can only own an airsoft gun with parental consent.
If your talking about what is the most powerful airsoft gun? Then my guess would be a sniper rifle. The WELL L96 sniper rifle is said to be the most powerful on the market. It shoots 500 feet per second and is also very accurate.
i personally like the m4 the best because it has so much rail space and their not the most expensive gun. the g36 is also nice because most of them have folding stocks, which gives you more maneuverability.
I guess it would depend on the gun but I have owned cheap and expensive guns and have never known it to happen.
An Airsoft gun
A pump airsoft gun is a gun that has to be pumped every time before shooting. Ex. Airsoft shotgun
No
Most airsoft guns have magazines that you put bbs into just like you put real bullets into a real gun's magazine
Electric is less expensive generally, but gas is usually more "realistic"