Sure wish some enterprising gunsmith would pick up on this little modification to the AR magazines. DPMS used to sell it as the "VLD Magazine", but i think the guy who was making it for them died. Here's a couple pics, the 2nd of which is the OAL needed for the 75 A-Max seated to the VLD magazine's max. length--
If you look closely at the back of the magazine in the top picture you can see where its spot-welded right behind the case. in the bottom picture the magazine is a lot thinner in that area, allowing him to slide the cartridge a little further back into the magazine. I belive it is no longer a stagger-feed type magazine, I've never seen one in person, and I dont think Steve's gonna give his up...
That's right Matt. Right on the nose. It allows for efficent seating of (probably) the best long-range varmint bullet out there for the AR 223-based cases--the A-Max's.
If a gunsmith or fabricator would be interested in putting this magazine back in circualtion i'd send them 1 to play with.
thats an interesting mag,,, but the 75 gr amax isnt much good for coyotes and your ar better have a 1-8 or 1-7 twist and a min 24" barrel and 26'" even better. the 52 gr amax would be a better choice for yotes.