“Just a few short comments that i found frustrating. The product description does not clearly call out which buffer tubes are best suited to work with it. It also doesn't mention it doesn't come with a castle nut and btw Luth doesn't ship a castle nut with their buffer tube either, if you decide to go KISS and just buy the Luth buffer to ensure capability. Some clearer explanation of what you are actually getting in the box would be helpful. Product is pretty darn good when you get it all together finally.”