I installed this Daniel Defense 16” pencil barrel on my home defense rifle a few years ago and barely shot it. I think I put a total of 200 to 300 rounds through it. After cleaning it, I thought I would give it a look with the Teslong borescope. I was puzzled at the condition of the bore. It has never shown any signs of rust, but seems to be pitted or abraded throughout the bore. I have never used anything but patches and more cleaner to clean this rifle. Has anybody else seen anything similar to this? Was this from hammer forging or some type of manufacturing process? I am tempted to use Tubb's Final Finish kit, to smooth out this obviously rough bore. Thanks for your input!