What must be done in order to add 3/16" to the back of the folower to raise up the back end of the case?
I'm just guessing muttman used an epoxy of some sort to build it up. Personally I would just get some Galil mags and use them as they are currently cheap and plentiful.
You guys can mod your AK74 mags all you like.
Geometry will defeat you every time.
The cartridge shape of the .223 does not play well with the mag curvature of the 5.45x39 magazine. You can add fancy followers, or mod the existing one, but you're still not going to have a 100% reliable magazine.
Unlike 10 years ago, when the AK74 magazine option was all a .223 AK owner had, we have several options available today that are designed for the .223 AK and will provide reliable service.
there is a post over at saiga-12 forms in the tech form. you will need to look for it, look for dezane (sp). it that gets deeper in to it, pc crash with no back up so no link. basicly you build up the raised pad the the case sets on with a taper From the Back to the Front, with the front of the folower having no build up, i.e. a wedge. you can use epxoy that is kneeded (sp) by hand not the runny mix with a stick type sold at homedepot.
I picked up 5 Orlite galil/golani? 35 round .223 magazines a few years back, for my saiga 223. It was like 1 for $11 or 5 for $40. something like that. pretty cheap. Anyways, I had to shave down the sides so they'd fit in the magwell, and also install a bullet guide on the trunnion. Just cut a piece of cast iron pipe to fit, ground groung ground shaved and then tapped and installed it. Worked great for me for a while, only problem was with the bullet guide i couldnt use any other magazines, such as ones made specifically for saiga 223. maybe just my guide was to big or in the way. i picked up a bunch of surefire 30 round mags for it since then and havent used the galil mags or the bullet guide. but it did work, and the mags were pretty cheap.
The factory mags come with a bullet guide built into them.
If you install a bullet guide in the gun, this built-in bullet guide on the factory magazine causes it to not fit (both bullet guides are trying to occupy the same space).
Some folks grind off the built-in bullet guide from their factory mags, but most folks just toss theirs in the drawer.