Do the 4-corner tweak. Simply spread the outermost four corners(which have zero affect on feed/function) and massage them until they snug into the receiver inlet.

No thang...............

I'll be damned if the magbox tweak didn't fix the 223ai feeding woes I was having. A pair of needlenose pliers, a couple of grunts, and the magbox now affords more space for the 223ai rounds to sit.

I was having a hell of a time with rounds nosing into the barrel shank and/or popping out of the mag box and was getting pissed.

Thanks for the post.

Fixin' shit,has been knowed to work..................(grin)

Is there any performance difference in milled followers? Are the "old style" as good or better than the new style OEM milled followers that have the extra ridge/lip running port side that makes the follower sit lower?

Well, the old style milled followers were half the price, so I bought some of those.....

Where did you find them?

I'm assuming these are the stamped ones, no?

http://www.midwayusa.com/viewProduct/default.aspx?productNumber=698795

Stamped............