30 rounds is standard for the AR-15, not a 'High Capacity' as some Democrat gun grabbers want you to believe. This is part of their effort to make a fully printable firearm.
Video embedded below.
"In response to the upsurge in gun violence, politicians are proposing restrictions on the number of bullets that handgun and rifle magazines can hold. And just as they do, new printing technology blows holes right through that debate. The 3-D printing gunsmiths at Defense Distributed are about to release blueprints for an upgraded magazine that won’t degrade even after you fire hundreds of rounds.
Meet the “Cuomo.” It’s a new printed magazine for your AR-15 rifle, soon to be available for download, and it holds 30 bullets. Upgrading an earlier design that didn’t hold up particularly well after extended use, it’s an unsubtle rejoinder to New York Governor Andrew Cuomo, who recently signed a magazine-restriction law limiting mags to seven rounds. Defense Distributed is basically saying that if you’re not going to be allowed to buy larger magazines in the near future, you can print them yourself — if, that is, 3-D printed weapons don’t fall into legislators’ own crosshairs.
In recent tests at a gun range near Austin, Texas, Defense Distributed fired a total of 342 rounds using the magazine with no issues, according to the group’s founder, Cody Wilson. The group fired 227 of those rounds using full automatic fire, while swapping out the barrels on the rifle to keep them cool. The group also uploaded a promotional video, seen above, demonstrating a portion of the test."