Barrel Nut Outside Diameter : 1., 35'' (34., 4 mm) Come with steel barrel nut: Barrel Nut Thread Spec., : 1-1/4-18 UNC The engraved grooves on the handguard body maintains the strength and stability that the shooters require by prevent from sliding. The top rail in Mil-spec is cut away with MLK slots at the front and rear end will be effectively for weight reduction and modularity. Guardamano AR15 Trirock New Clamp Style 17 Inches Black MLK Free Float AR15 M16 M4 Rifle Handguard With A Slant Cut Nose Fit .223/5.56 Rifles Acero Aluminio Package included: One Handguard Rail + Screws + Shims + Allen Key + Steel Barrel Nut Advertencia de seguridad Peligro de asfixia – Contiene piezas pequenas This handguard is made with 6061 aluminum extrusion and with being hard black anodized under strict standards with top quality tooling, that will provide a... Barrel Nut Inside Diameter : 1., 02'' ( 26 mm) Compra online TRIROCK New Clamp Style 7 Inches Black M-LOK Free Float AR15 M16 M4 Rifle handguard with a Slant Cut Nose fit .223/5.56 Rifles. Envío en 1 día GRATIS con Prime