Customize your AR-10 or AR-15 with an adjustable buffer from ODIN Works. They are always looking for new ways to make your build as customizable as possible to fit you, the shooter. If you want a smoother operating AR, this AR adjustable buffer does just that. Available to fit AR-10, AR-15, and 9mm platforms, each buffer also comes with multiple weights to customize the weight combination for your build. No matter your needs, OpticsPlanet has the AR15 Recoil Buffers for you! Specifications for ODIN Works AR-15 Adjustable Buffer: Manufacturer: ODIN Works Gun Model: AR-15 Features of ODIN Works AR-15 Adjustable Buffer Available In Ar15, Ar10 And 9Mm Ar15 Buffers Available In Either Lite Or Heavy Ar10 And 9Mm Buffers Only Available In Heavy Lite Buffer Made From Aluminum Heavy Buffer Made From Stainless Steel Weights Included For Different Weight Combinations Ar15 Comes With 3 Aluminum, 3 Stainless Steel And 1 Tungsten Weights (Lite: 2.1Oz - 4.2Oz, Heavy: 3.7Oz - 5.8Oz) Ar10 Comes With 1 Aluminum, 1 Stainless Steel And 1 Tungsten Weights (3.45Oz - 4.65Oz) 9Mm Comes With 1 Aluminum, 1 Stainless Steel And 3 Tungsten Weights (5.4Oz - 7.4Oz) Package Contents: ODIN Works AR-15 Adjustable Buffer AR15 comes with 3 aluminum 3 stainless steel and 1 tungsten weights (Lite: 2.1oz - 4.2oz Heavy: 3.7oz - 5.8oz)