The MOE SL Hand Guard for AR15/M4 firearms with mid-length gas system and A2 font sight* provides modular flexibility with M-LOK(R) accessory slots in a lightweight"" sleek"" cost effective design. Designed with versatility in mind"" M-LOK slots at the two"" six"" and ten o'clock positions allow the attachment of optional Picatinny rail sections and other accessories for mounting tactical lights"" slings"" grips"" etc. Reinforced"" heat-resistant polymer construction provides durability without the weight and expense of an aluminum rail hand guard. A large front extension and lower lip protects the user from the hot front sight gas block assembly and maximizes useable hand guard length.