Big-bore AR's and States with magazine restrictions

It is legal in CA according to Calguns.

It would be wise to buy .50 Beowulf magazines that explicitly state that they are for that caliber to avoid legal issues.

I remember during 1994-2004 when 10 round magazines were mandated a lot of people started carrying .40 and .45 handguns instead of 9mms.

Now you are seeing the same thing in states with magazine limits in regards to ARs. People are thinking that if I am limited to 10 rounds I will shoot a .458 SOCOM or .50 Beowulf instead of a .223/5.56 .

Just my .02,
LeonCarr

My friend used a laser to engrave his standard USGI magazines to indicate they are 10 round .458Socom magazines.

Depends on the exact language of the law.

Here in CO they would not be legal. The readily converted language rules that out; a simple follower swap is readily converted. It does not matter what caliber is marked on the mag only that it will feed >15 rounds of any ammo. They'll probably even do that without replacing the follower, just have issues with the last couple.

Note this has not been tested in CO courts and the guidance given by the state AG does not address this issue. This is just based on my (now-lawyer) reading of the law.

In Canada, rifle mags are limited to 5 rounds, pistol 10. Sub caliber use and using a pistol mag in a rifle are not restricted .50 Beowulf and .458 SOCOOM pistol mags marked by caliber and "pistol" have become very popular, at one point selling for as much as $300.

Mike

it's called laser print your ar15 mags

The readily converted issue is going to be big one in magazines of such a nature. I started printing out (use my 3D printer) .458 Socom followers for my .223 mags. In essence single stack follower that wouldn't allow .223 to feed. The problem I think we'll get into is, what happens when a law enforcement agency can drop thirty loose rounds in the magazine and get a few to fire while clearing jams and such. Then you might have a problem. Law enforcement can be really particular about this nonsense.

For grins and giggles I took three ten rounders I had found at a garage sale and with a hand file and some duct tape plus a little JB Weld, I was able to make a fully functional thirty round mag. It was ugly as sin but it worked for 120rds straight the day I took it to the range.

So you could start building a mag (aluminum sheeting) and before you even cut or bend something, put it int your CNC engraver and engrave .458 Socom 10 Round Magazine, and then run the rest of the engraver for your lips and cut portions and then put it in your mag jig and either use a ton press or do it by hand yourself. Use a bit of metal wire or instrument wire and mandel for your mag springs (will need to heat treat your springs), and cut your base out of the sheet you made your mag out of and do a bit of hand work for the bottom lips which will be helped a great deal by having another jig you premade.

Then when the cops pull you over you'll get to be test case, good luck.