[Kompressa] is probably my favorite weapon in Warframe.

Notes:
This weapon takes a lot of time and forma to build, but it's worth it!
I don't personally use galvanized shot, I use a riven with status chance, multishot, and -recoil because I get horrible motion sickness when using this with its recoil.
In high enough level if you don't destroy everything with this, it still makes a great primer.

Possible Replacements:
I prefer cascadia flare over secondary merciless and cascadia empowered, but use whichever you like.
[Primed Fulmination] can be replaced with any primed expel mod or riven for endurance runs, I like the extra AoE and diversity for more general use though.

I love [Kompressa]
I don't know what else to write
So have a haiku