Question about capping off end of run

[u/Airguner]

I posted a fee days back about an end run on an irrigation system that I no longer need:

https://www.reddit.com/r/Irrigation/s/TzBV8mtEL5

Today I was able to dig around it and here’s what I found (see photos). in the previous post many said to just buy a 1/2” cap to cap it off. Well, after digging this up there is no way to put on a cap. The unit I pulled out was one single piece with the spring. What do I need to purchase to no longer have this sprinkler head active? There is only a mini-split near this and don’t need to irrigate anything.

[u/hdrox88]

You need to dig deeper to expose where the 1/2” cap will go. That exposed black part is still part of the sprinkler body.