Maxim Defense Industries CQB Buffer and Spring H3 4.85 oz. AR-15 Features: Maxim Defense Industries is offering a line of custom buffers and springs which are designed to pair perfectly with this CQB stock systems. The custom spring and buffer weights will allow you to tune your firearm for specific loads and brass ejection patterns getting the most out of your platform. Maxim Defense Industries CQB Buffer and Spring H3 4.85 oz. AR-15 Specifications: Maxim Defense Buffer/Spring Combo (H3) Specifications and Features: Maxim Defense MXM-47567 CQB Buffer/Spring Combination H3 Buffer Weight 4.85oz Tungsten/Stainless Steel Natural Finish Fits: Maxim s CQB Stock