How Do You Get Mods Like Barrel Diffusion And Split Chamber?

[VeryNinja]

I'm far-ish into the game now and I still have yet to earn any of these mods. Any tips for me?

[_Absolom_]

B.d.: Jupiter-Io, wave 5-15. If nothint shows up, exit and retry.

S.C.: Pluto-Outer Terminus, wave 5-15. Same as above.

[VeryNinja]

Thanks, I'll go try

[Grimfrost]

Warframe wiki got nice info on every mod. Were to look for it and from whom that mod drops.
Also got mucho nice info any anything with warframe.

http://warframe.wikia.com/wiki/WARFRAME_Wiki

[rhoenix]

Split Chamber can drop from Survival missions against Grineer as well. I've received several ammo mutation mods, Flow, Focus, Streamline, Serration, and Split Chamber from running Apollodorus on Mercury to level stuff.

[shut]

~7 months of playing and I've had neither drop for me. Ever.

 

Trading is always an option.

[Deservate]

To be more specific:

Barrel diffusion: Drops from seekers and as reward from t3 defence

Split Chamber: Drops from Ruk the Truck (Excuse me. I meant Sargas Ruk), Leech Osprey, Raptor, the unavailable Corpus t3 defence and as reward from t3 survival

Transmutation is always a possibility, of course.