The Liberator Penetrator in Helldivers 2 is an excellent fire-based rifle, serving as an advanced ballistic weapon. It explodes and ignites targets upon impact. To maximize its effectiveness, a good modification setup is recommended, with the top choice being a 4x scope, vertical grip, and muzzle brake (compensator).
Best Modifications for the Liberator Penetrator in Helldivers 2
Liberator
Three-line Setup: 4x Scope + Vertical Grip + Muzzle Brake (Compensator)
When fighting on the Southeastern Front, it's generally best to strafe left and right.
Switching to other optics only grants two points to ergonomics, while having no sight doesn't increase ergonomics at all. So, it's better to use those two points for a 4x scope.
A strong weapon for the Three-Line Front; very powerful on the Southern Front, decent on the Eastern Front, and also a solid ballistic option on the Western Front.