The SP3Rv3 Rail was designed out of necessity from shooting 3 gun and sniper competitions where barricade or improvised shooting positions are frequent. At only 2" wide, it fits perfectly into your hand and it is extremely light weight. On a barricade, barrel, ledge or port opening the flat surfaces give you a sturdy rest allowing for super fast, accurate shot placement. There are now keymod cuts at the 3, 6 and 9 o'clock positions that will accept keymod accessory rails from most manufacturers.
The SP3R is available in 12" and 15" lengths.