Now that’s better.

Another overnight soak, a bit more brushing and swabbing. Much cleaner.

However . . . I think all the lines ‘n stuff are machining marks. They run the length of the barrel each side of a land. The carbon sure has a place to latch onto.

But here’s an interesting pic. Inside the gas port you can see the adjustment mechanism.

So, earlier today I’m looking at these pics and Mrs. Red says, “Are those from your colonoscopy this morning?”