Luth-AR Gas Tube - Mid Length Silver. 223/5.56 AR Gas Tube: Manufacturer: Luth-AR Color: Silver Fabric/Material: Stainless Steel Gun Make: AR Platform Caliber: 5.56x45mm NATO .223 Remington Features of Luth-AR .223/5.56 AR Gas Tube: Shipping Weight .75 lbs Shipping Dimensions 8 x 6 x 2.5 in Length Rifle 15 3/16 Mid 11 3/4 Carbine 9 3/4 Pistol 6 11/16 Material Stainless Steel Weight Ounce Carbine 1 Mid Length 1.5 Pistol .9 Standard 1.5 Weight lbs Carbine .06 Mid Length .09 Pistol .06 Standard .09 UPC Code Carbine 859819007669 Mid Length 859819007683 Pistol 859819007676 Standard 859819007652 Package Contents: Luth-AR .223/5.56 AR Gas Tube Luth-AR BL-04C: Gas Tube - Mid Length Silver