Hey everyone. Can't seem to find the answer to my question so figured I'd ask the board in general. Armalite's postings on their AR10 say "DPMS mags may work...we haven't tried them". That only raises questions for me. Why would a major .308 AR maker would take time to try pmags (or any other brand) but not take time to try DPMS mags? Doesn't make sense. To me, at least. It would seem that it takes no more time to try the DPMS mags than trying the Pmags. Perhaps, in my suspicious mind, what Armalite is really saying is "We designed the 10A to work specifically with PMags. We hope the design works with DPMS mags but we really didn't go out of our way to make sure." Thanks for everyone's answer. Link to explain the latest on UN gun ban treaty. Good article explaining what pro-gun groups object to in the July 25 draft of the UN Gun Ban Plan. That's what it is: a Gun Ban Plan. http://www.foxnews.com/world/2012/07/25/un-treaty-takes-shape-and-takes-aim-at-gun-owners/ Excerpt from link. See where this is going? Other articles say the Gun Ban Plan would affect import of gun parts. Like barrels, magazines, parts kits....everything that gun loving Americans like. Here's the excerpt from above link (emphasis mine): The draft treaty’s amendment provisions have become a new point of focus for campaigners keen to protect the integrity of U.S. Second Amendment rights to gun ownership and other U.S. interests. Language stating that amendments are only legally binding on a country if “accepted” by its government is ambiguous, according to some experts. Past practice dictates acceptance is necessary if an amendment is to carry legal weight in a country, but the terms of this treaty have already veered from the norm with the UN General Assembly’s acceptance of the agreement-by-consensus provision. The draft treaty’s amendment rules also fail to stipulate a quorum for an amendment vote. “That could be done by just 10 states,” said Tom Mason, U.S. executive secretary of the World Forum on the Future of Sport Shooting Activities, an association of hunting, shooting and industry organizations, including the National Rifle Association. He said the U.S. Second Amendment is protected only by sovereignty and “lawful private ownership” references in the draft’s preamble – a part of a treaty that is not typically legally binding. He also lamented that the draft fails to specifically exempt civilian arms from its “covered items.”