Spike's Tactical BAR2 Rail, Fits AR-15 Rifles, 13.5 Free Floating, Black SAR2113 The Spike's Tactical LW BAR2 Handguard is a one-piece free floating quad-rail that is machined from 6061-T6 aluminum and finished in a type III hardcoat anodizing. The main benefit of the BAR rail is to those who wish to have a suppressor inside of the rail. The BAR rail also offers excellent heat ventilation and built in anti-rotation tabs to keep the rail and barrel nut from coming loose. Includes 3 ladder rail panels and mounting hardware.