“Combined with the Aero M4E1 Enhanced upper these rails give you a near-monolithic setup. That rail is not moving. It is a rather large rail (inside diameter), but that makes them outstanding for under-rail suppressor applications.”
“Great handguard. Excellent machining and anodizing. It took quite a bit of trial and error to install the barrel nut and get it timed properly. I wound up using another thicker shim to get it perfect. Be sure to Loctite the anti-rotation screws.”
