Magpul ACS stock.  Black.  Fits commercial buffer tubes.  New, never used.  

I carry many other AR parts in stock.  I also offer guaging services as well as full custom builds, gunsmithing, feed ramp polishing, Pin and Weld services, etc.  If you need something you don't see, just reach out. 

I am a FFL/SOT dealer near Clever/Billings, MO.  I have low overhead and offer personal service.  Let me know how I can serve you today!