I don't know for sure if you are talking about the gun I think you are, but the one I am thinking of is advertised at like 430 fps on the box, but my friend has one that cronoed in at 380 fps, which is good because the place we go has a 400 fps max.
It has 450 fps
280 fps
FPS depends on the type of bb used, quality of the bb, weight of the bb, and the chronograph. On top of that, it depends what shotgun it is! There are many, many airsoft shotguns out there.
500+
Not much. It is only 130 feet per second. It sounds fast, but in reality, most airsoft guns shoot at about 300 fps.
"1000000000000000000000 FPS it is sweet"? Morons have to much free time From what I can tell it is about 290 FPS. It looks a decent gun for the price. If you like this gun check out the Smith & Wesson M3000 Airsoft Shotgun.
most likely about 10-20 fps
Yes they are safe to be used in airsoft and can withstand almost 750 fps (i tried an expirament with my goggles and my friend had a 725 fps gun and shot my goggles to see how tough they were and they held pretty well.
All depends on 2 things: how much fps the airsoft gun has and how thick the armor is 200- fps wont feel like anything higher up 400-600 fps might feel like a bee sting or less depending on the thickness of the armor
it depends what kind?
Well, the legal FPS for an airsoft gun is 450, but you can get snipers, AEG's, etc. that run up to 600 FPS and beyond.
go for the m14, unless its cheap looking.