Legal Thread. I assume no responsiblity for what you do with this advice. That is all it is, advice. Check the laws for yourself. Laws can change. You are responsible for yourself and your actions. FFL Purchases You have to be 18 to purchase a long gun or long gun ammo from anyone who holds an FFL. You have to be 21 to purchase a handgun or handung ammo from anyone who holds an FFL. This is Federal law. Don't bitch when the zit faced kid at WalMart turns you away. Private Party Purchases Laws are different when not purchasing from an FFL, aka a Private Party Purchase. Check your state laws. Long guns: Some states are 18, some are 16, some don't have an age. Handguns: Look up handgun possession by a juvenile or similar in your state laws. You can find them on the web. It is most likely 18 years old for a handgun, but check to be sure. Did I mention check your state laws? You SHOULD check age when you sell a gun, and also have the person sign a bill of sale. This is not required but will come in handy later if needed. National Firearms Act Machineguns are legal. Pretty much everything is legal, you just need the proper paperwork. Refer there, I dont feel like typing it out: http://files.uzitalk.com/reference/pages/legal.htm Homebuilt Guns Yes you can build your own gun. No, there is no Federal law saying you have to mark it. State laws? Maybe. No, there is no Federal law saying you have to register any gun. State law? Maybe. Your responsibility to check. Make sure your rifle has a barrel longer than 16" and your shotgun has one longer than 18". You can make a shortbarreled homemade gun, just have an approved form 1 before you start on the gun. Make sure your gun cannot accept full auto parts, make sure it shoots one bullet with one trigger pull. 922r. No semiautomatic rifle or shotgun that is prohibited from import can be assembled using more than 10 imported parts. Make sure 10 of these parts of your gun are US made. (1) Frames, receivers, receiver castings, forgings or stampings (2) Barrels (3) Barrel extensions (4) Mounting blocks (trunions) (5) Muzzle attachments (6) Bolts (7) Bolt carriers (8) Operating rods (9) Gas pistons (10) Trigger housings (11) Triggers (12) Hammers (13) Sears (14) Disconnectors (15) Butt stocks (16) Pistol grips (17) Forearms, hand guards (18) Magazine bodies (19) Magazine Followers (20) Magazine Floor plates Machine Gun Ban Any machineguns made after May 1986 are restricted to dealer and law enforcement ownership only. Don't build one. Anything else you guys want on here?