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American Tactical has partnered with German arms manufacturer Schmeisser GmbH to exclusively import and distribute the Schemisser S60 60 round AR-15 magazine.  Made from glass reinforced polymer, this patent pending magazine features a unique follower system that allows for double capacity from a normal AR magazine without being bulky or cumbersome.  Designed to shoot both .223 REM & 5.56X45MM, the Schmeisser S60 will give you an instant capacity upgrade over the standard AR mag at an affordable price for your AR Carbine or Pistol.
Now featuring a last round bolt hold open integrated in the follower!

Disclaimer:

The Schmeisser S60 was built specifically for .223REM or 5.56X45MM ammo only.  Schmeisser & American Tactical have done some testing and found that the S60 may not operate with all types of .300 Blackout ammo.  Due to inconsistancies with different brands, Schmeisser does not recommend using 300 Blackout with this magazine.  Failure for the magazine to operate with 300 Blackout is not covered by American Tactical's Limited LIfetime Warranty.
Warning! - High Tension Spring

The Schmeisser S60 has a very powerful high-tension spring.  Please use caution if disassembling the magazine for maintenance.  If not properly secured, spring may eject from magazine when floor plate is removed and can cause serious injury.