First off, it's "if you're wearing a sweater" lol, just had to do that. It all depends on the weave of the sweater. If it's a tight weave it prolly won't penetrate but might transmit more energy, it it's a loose weave it will absorb more energy but maybe penetrate and contact skin. You'll still feel it when it hits, maybe a little, maybe a lot. Have Fun
What you do is switch out the spring for a weaker spring
It would be 350fps which means that the BBs fired from the gun travel 350 feet per second.
Any airsoft gun can use .12s but they will damage them in the long run. You should always use .2s and up. 200- 300fps= .2 300- 350fps= .23 350-400 = .25 and so on.
350FPS would be sufficient
With the proper safety equipment, and playing with guns that are shooting below the safe 300-350fps range there has never been a death from a paintball headshot. However, if you were to get hit with a gun firing excessivly fast, or get hit in the eye because you weren't wearing a mask there is a risk of death. Paintball, when played with the proper equipment within safety margins is one of the safest leisure activities in the world.
it depends on wat ak 47 you have but most of them are like 250-350fps (feet per second)^That information is incorrect, most AK series AEG's have "V3" gearboxes, which are very durable and usually have over 360 feet per second. Every AK is different though, but from experience with most companies AK's being an Airsoft tech of 6 years and Russian enthusiast, Most CYMA AK-47's shoot between 375-420 fps, most DBoy's shoot around 400, most G&G shoot around 350, and I am unfamiliar with other brands. Read up on airsoft knowledge, as this question was rather nooby. But, we all gotta start somewhere!As for feet that depends on so many variables I will not go into it now, but I will list a few.Hop up- Puts backspin on the BB, allows it to glide through air unlike paintballs.Barrel length- A "runway" for the BB that helps it develop a straighter path.The bore of the barrel- An upgraded 6.03 is most desirable for AEGs for tight groupings.And fps/bb weight. A heavier BB being used with a higher fps will give the bb more inertia, and let it travel further.A quality AK ($100 or above) can shoot anywhere (stock, no upgrades) between 100 and 200 feet.
It should theoretically be able to, but I would definately recommend against it since metal bbs could severely damage various internal parts, including your barrel and hop-up. That said, using basic kinetic energy calculations (KE = .5 * m * v^2), a .3g bb should have a muzzle velocity of 163 fps (assuming the 200fps is with a .2g bb)
Middle of the road for a pistol it is about in the middle of the average fps range for an aeg it is a little weak, with most firing between 350-450 fps, although it is plenty for any situation other than long range shooting.
There is no specific minimum fps required to kill a bird as it depends on factors like the type of bird, shot placement, and the projectile being used. However, a general guideline is that for small birds, a minimum of 1000 fps may be sufficient, while larger birds may require higher velocities. It's important to always follow proper hunting and firearm safety guidelines.