NEW! Aggressive design, ultra light 5.5 free float hand guard. Our unique design features a very slim profile (1.375 ID) that still allows for the installation of a sound suppressor of 1.40 in diameter and smaller to tuck inside of the handguard when used with an exact length 6 barrel. Works with 223/5.56 and 9mm calibers. Handguard does not require timing and installs with a standard wrench. Features: Modern free float design with M-LOK mounting interface on the 3, 6, & 9 O clock positions Continuous top mil-spec 1913 picatinny rail with lightening cut 2 QD swivel mounting points Engraved Angstadt Arms logo Compatible with both forged and billet upper receivers Compatible with both 223/5.56 and 9mm Handguard does not require timing and installs with a standard wrench. Mil-Spec hard coat black anodize finish Weight: 5.3 oz ID: 1.375* The last of the handguard is bored out to 1.405 , allowing most aftermarket sound suppressors 1.39 in diameter and smaller to tuck inside of the handguard when used with an exact length 6 barrel. Length: 5.5 Includes hardware Compatible with all AR calibers except .308