Taking from the sticky "Why you should convert your Saiga":
Your Saiga is made in the same plant, by the same people, and on the same lines as all Russian AK's. The 74's, the AKMs, the 100 series, etc, are all made at Izhmash, the Russian factory where Mr. Kalashnikov still works. Yes, the man that designed the AK-47 still works there. Now look on the side of your gun, it says Izhmash on it and has their arrow in a triangle symbol. Now is when you can crack an evil smile.
In order to be imported into this country, it had to be neutered. It had to be in "sporting configuration" to be importable by law. That is why all the cool guns are made in the United States, or imported in a neutered form, or totally unavailable. The Saiga is only imported at this time, so they all start out with a conventional stock manner, which is NOT the way they are supposed to be configured. They put a plate over the trigger hole on the bottom of your receiver. Underneath that plate is the trigger, which has the lever part where your finger would go removed, it is just the mechanical portion of it left behind. So your trigger/sear, disconnector, and hammer are all in place where they should be. The problem is that the trigger you actually pull is connected to a bar... and that bar pulls the actual trigger. Ridiculous? OH YEAH. But it is how they have to import them thanks to our laws. It is 100% legal by Federal law to "convert" your Saiga to regular AK setup, which is quite easy to do. It is just removal of two pins, and your fire control group, which just slide in and out. The pins you need to remove are rivets though, so you have to grind their ends off to push them out. Then you need to get a trigger guard, either screw on or weld on, and put on your new furniture.
Some states, I know Connecticut and New York are in this group, still have elements of the 1994 gun ban in their state laws. They say that any semi auto magazine fed shotgun cannot have a pistol grip below the receiver of the gun. Ruins your plans I bet. Well it didn't ruin mine. You can put on a one piece skeleton stock or thumbhole stock to get around that and still get great ergonomics.
Once you do this, OR attach a magazine of over 5, at 10, or over 10 round capacity? edit this out later, you are putting your gun in a "non-sporting configuration". This means you have to comply with Federal law 922r. Yes, this means if you saw a gun store with a 12 round Surefire mag in their gun, they were breaking federal law. Seriously. Don't use it until you have the right American made parts in your gun, or you could go to jail. I'm not joking, and I am not mistaken.
This law states that you cannot have more than 10 imported parts within a list of parts that are important. Check this website for easy check on this:
922r worksheet: http://www.thegunwik...erifyCompliance
If you want to use higher capacity magazines on your Saiga shotgun, you have to replace other parts to make it legal by Federal law. Might as well convert, buddy. You're going to be replacing stuff anyway.