SLR 14.87 inch HELIX M-LOK .308 Low Profile Handguard Black 308L-HELIX14.87ML. 45 inch Internal Diameter. SLR's most lightweight handguard design. DPMS Low Profile. Mil-Spec Hardcoat Anodize. 7075 Barrel nut w/Hardcoat Anodize. Free Floating Design. 4...