Originally Posted by AngelusNex
500 fps AND 5 joules energy Is a restricted firearm (I'm 99% certain that it's supposed to be both)
Also, have you ever built something like this before? If not good luck, your going to spend minimum 10x that of buying a few guns. and If it looks ANYTHING AT ALL like a real firearm (ie, if cops decide it kinda looks like a replica) then it's illegal to build.
It wouldn't make it a restricted firearm. It would be UNrestricted.
And it doesn't sound like he wants to build airsoft guns, so why would he buy them?