A modern 14.8" M-LOK handguard with 45Adeg mounting offsets, an internal diameter of 1.7", QD swivel points and best of all - No timing or shims required! Features: M-LOK mounting interface on the 3, 6, 9 O'clock positions as well as on the 45 degree angle surfaces Continuous top mil-spec 1913 picatinny rail with lightening cut 2 QD swivel mounting points Compatible with both forged and billet upper receivers Compatible with both .223/5.56 and 9mm Handguard does not require timing or shims Finish: Mil-Spec hard coat black anodize finish with Angstadt Arms laser engraved markings Weight with hardware: 14.5oz ID (Minimum): 1.7" Length: 14.838" Includes all hardware Compatible with all AR calibers except .308