Quoted:
Quoted: Remember that simply installing an extended mag on an M4 could get you into some legal problems with ATF. There is a reason the M4 was imported with a crimped mag tube. I would advise not to do so and then post pics of them here or anywhere on the internet unless you have taken the correct steps to comply with 922r. |
It's legal to add a US magazine extension to a Benelli M4.
1981 |
922r does not allow you to simply add a US made extension without making any other modification. There are other parts you must replace with US parts in order to be legal (example-gas pistons, stocks, etc), otherwise you will exceed the allowable number of import parts on a non sporting shotgun.
I believe there used to be a sticky here of an ATF opinion listing all of the parts that they look at in determining 922r compliance. Of course that opinion is good only for that particular person who wrote asking for the opinion. In order to be legal and CYA you will have to write them yourself asking for what parts can be replaced with US parts and then replace a certain number of them with US parts before you can legally add the extension tube.
Big PITA, I doubt many people do all of this this, they just add the tube and go because they either don't know about this stupid ass 922r crap or don't think they will ever be prosecuted.
Edit: And once you go through all the hoops of complying with 922r, you have now created a non sporting shotgun. Unfortunately thanks to the CGA of 1968, ATF can at any time now declare your M4 with extension tube to be a DD, and thats a whole other story that nobody wants to talk about.