Because air molecules are very small and don't require a large hole
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you can't!
You kan make 1
Search the web for air gun repair or air gun tuning. There are several shops that tune or modify air guns.
A BB gun is an Air Gun. Now if you are asking is a BB gun better than an "Air Soft" gun that is different. As for better, well it all depends on what you want it for. A BB gun will do more damage than an Air Soft gun. But that doesn't make it better. basically an air gun has hollow pellets to a bb gun a bb gun has metal balls so they are basically the same gun but with different types of bullets
What model BB gun are you asking about.
Removing the Air restrictor in a Nerf/Buzzbee gun increses the amount of air force able to use to push out the dart further and therefore make the gun more powerful.
no. Airsoft guns could not possibly shoot that fast.
This is called the "muzzle" of the gun.
Dan Wesson makes a real firearm. And has contracted Crosman to make a Real BB gun and an Airsoft gun.
Like $500 I guess