As per manufacturer's site:
Our Enhanced M-LOK (EM) Handguards provide a lightweight free float design for your custom M5 .308 build. The M-LOK system allows advanced modularity past the current 1913 picatinny rail system. Machined to mil-spec dimensions and engineered to perfection, this handguard eliminates bulk while retaining strength and stability.
-1pc free float design
-Built in anti-rotation tabs
-1.72" inside diameter fits most muzzle devices and 1.5" suppressors
-Compatible with low profile gas blocks
-DPMS High Profile (.210) Tang
-Gen 2 Feature - Quick disconnect sling socket at the 3, 6 and 9 o’clock positions
-Gen 2 Feature - Additional milling along flats to aid with gripping and add visual appeal
-Gen 2 Feature - New profile for the continuous picatinny top rail.