SLR 11.7 inch HELIX M-LOK .308 High Profile Handguard Black 308H-HELIX11.7ML. 45 inch Internal Diameter. SLR's most lightweight handguard design. DPMS High Profile. Mil-Spec Hardcoat Anodize. 7075 Barrel nut w/ Hardcoat Anodize. Free Floating Design. 4...