The AR-STONER(TM) Extreme Duty Rifle Buffer Tube Assembly is great for upgrading your AR-15 to an A2 Stock. Machined from 7075 -T6 Aluminum, this buffer tube assembly fits excellently and functions in the harshest conditions. With a hard coat anodized finish and an 84% tensile strength increase over traditional aluminum, this buffer tube assembly will withstand years of abuse. A stainless steel buffer spring resists corrosion and rounds out the assembly. Just because your rifle has a traditional buttstock, does not mean it has to have traditional components. Upgrade your AR with the AR-STONER(TM) Extreme Duty Rifle Buffer Tube Assembly. FeaturesImpact Resistant 7075 -T6 AluminumStainless Steel Buffer SpringMade for A2 ButtstockAnodized Finish