General
The MXR M116 Fullbore Metal analogue distortion pedal packs the extreme gain needed for the loudest modern metal sounds and comes loaded with a 3-band EQ so you can dial in anything from thin-and-sharp to warm-and-heavy. Flip the Scoop switch if you're after a Nu-Metal sound, or tighten up your riffs with the adjustable noise gate.
The M116 Fullbore Metal: True Hardwire Bypass
In addition to a gain control for the distortion level, the M116 Fullbore Metal features a volume control as well as individual pots for the lows, mids and highs. The Frequency control can be tweaked to boost or weaken a specific part of the mid-range, while noise and unwanted feedback can be eliminated with the gate control - the sensitivity of which can be shifted round the back of the stompbox. Last but not least, the M116 is a true hardwire bypass pedal, meaning it leaves your normal guitar sound completely unaffected when it's switched off.