Bought this upper from PK Firearms a few years ago.
It has an ER Shaw rifle barrel, twenty inch fluted stainless steel, 1x8 twist, and Wylde chamber. Includes flat top upper receiver and gas tube. Delta ring assembly, sling swivel and hand guard cap removed for use of a free floating rail.
It's used, in good +/- very good condition. Round count less than 500. Most likely far less. I didn't count. Sights lined up well. No excessive windage either direction and front site post worked well with an ARMS #40L though not F marked. Feed ramps have been polished. Reliability has been 100%. There are handling and minor wear marks but I took a lot of pictures so you can see exactly what you'll get and what is or is not included. Feedback rating +79.
Pay Pal or Postal Money Order. Shipping included lower 48. No Pay Pal fee. Post "I'll take It" here and follow up by email or IM please. My feedback rating is +79.