January 27, 2009: A big problem with the M-16 type rifle is that the fine sand and dust found in Iraq and Afghanistan can slip past the magazine and into the magazine well, and lead to a malfunction. So commercial firms have come out with several generations of magazines that try to seal the magazine well to keep the talcum powder like crud out of the rifle. The latest of these is the Advanced Reliability Combat magazine, that includes a soft gasket that creates a dust proof seal when the magazine is inserted in an M-4, or similar weapon (like the SOCOM SCAR). These magazines cost $30 each (about 70 percent more than a standard magazine.)