Abstract: A modular rail attachment hand guard system can fit aftermarket gas piston equipped military and sporting rifles. The modular rail attachment hand guard system may include a removable upper section, the upper section having two lower longitudinal sides, and a lower section where the lower section has at least two longitudinal sides. The removable upper section may be secured via a single fastener and the removable upper section can be removed after the single fastener is released.

Abstract: Methods and systems are provided for reducing the overhead associated with media commands issued to computing devices. A request is received from an application to access a device, and a single media present command is issued to a device driver to determine if media is present in the device. The request is passed to the device driver only if media is present in the device. Moreover, a method of intercepting commands issued to a device driver, is provided wherein a call is received from an application which is intended for a device driver, the call is buffered until media is present in a device whereupon the call is released to the device driver for processing.