DEFIANCE is the KRISS Group’s brand of top quality weapon accessories. The KRYTAC TR113 Licensed by DEFIANCE is a 13 inch rail system constructed of weapons grade aluminum and feature the latest in firearms accessories technology, the keymod system. The DEFIANCE TR rail system line features keymod slots at the 3, 6, and 9 o’clock positions with a standard picatinny rail at the 12 o’clock. The front of the TR rail series feature 3 sharp protrusions that are designed to assist the shooter in stabilizing the rifle when firing from behind a barricade. The shape of the rail has been carefully contoured to provide a comfortable and secure grip with the support hand, with or without accessories attached. The rail attaches to the barrel nut with two large hex screws, making assembly and disassembly very simple.