TRIPLE RAIL MOUNTING SYSTEM - Versatile polymer triple rail mounting system is available as a single 3 Picatinny rail (TRM) two 2.5 45� Picatinny rails (TRM2) or combined to provide a triple rail mount (TRM3). Use all 3 rails on lower handguards for grip with easy thumb access to light & laser on side rails or use 3 rail on bottom & 2.5 rails on top. - Allows easy tactical light operation while using a vertical grip and light mount - Rails can be used independently of each other - 45 � rails will not interfere with iron sights - Mounts on the upper and lower vent holes of most existing standard handguards - Fits: M16/AR15/M4 - Number of Rails: 1 - Material: Polymer - Weight (oz.): 3 - Width (in.): 2.75 - Length (in.): 3 - Height (in.): 1.5