Mag rims get there name from what metal they are made from. Magnesium! It's is a very interesting metal. It's very light weight, strong and cheap. At the right temperature it melts like any other metal however if you get it to hot it burns. Like friken crazy! Anyways mag rims are made by melting magnesium and injecting it into a mold. After cooling the rims are then tooled to finish their look and function.
Unknown.
2
made them with 16 round mags, 30 rnd & 36 rnd mags depending on the caliber.
generally, mags are made from aluminum.
600 were made
No
Cro-Mags was created in 1981.
You will have to have them custom made
NO Beretta mags and other makes of mags can be made to work in xd's. Xd mags have a hole in the front of the mag for the mag catch. That hole can be added to other mags to make them work in xd's. There are a couple of problems with this. Alot of these mags will feed but the follower is different and won't contact the slide stop and lock the slide back. Also if the mag is too long and beretta mags are, the feedlips can contact the ejector of the xd when the mag is inserted. This can break the ejector if they mags are inserted hard.
No. The mags for the 9mm are different than the mags for a .40 S&W
30 in Standard mags 40 in Extended mags 75 in Drum mags those were the common mags, there are also custom 60 round mags that look like 2 standard ones back to back that form a half-circle shape
9bkr iz da best class at mags.