Luth-AR Double Tungsten H2-Buffer Carbine. 223/5.56 Carbine Buffer Body Using a heavier AR-15 buffer helps reliable function with short gas system rifles. You may also experience a reduction in felt recoil. The H2 contains 2 tungsten slugs and a single steel slug in the buffer for a total weight of 4.8 oz or .30 lbs. SKU: LCS-T2 Specifications for Luth-AR Double Tungsten H2-Buffer: Manufacturer: Luth-AR Fabric/Material: Steel Gun Make: AR Platform Gun Model: AR-15 Weight: 4.7 oz Additional Features: Double Tungsten Gun Type: Carbine Caliber: 5.56x45mm NATO .223 Remington Height: 3 in Features of Luth-AR Double Tungsten H2-Buffer: Shipping Weight .75 lbs Shipping Dimensions 8 x 6 x 2.5 in Application Carbine Caliber .223 Height 3 1/4 Weight Ounce 4.7 Weight lbs .29 UPC Code 859819007218 Package Contents: Luth-AR Double Tungsten H2-Buffer What firearm models does the manufacturer say Luth-AR Double Tungsten H2-Buffer is compatible with? The manufacturer suggests that Luth-AR Double Tungsten H2-Buffer is compatible with AR-15Luth-AR CS-T2: Double Tungsten H2-Buffer Carbine