Hello there,

As per Wiki:

• Tenet Tetra: Greater magazine, can eject its entire clip into a grenade.
• The weapon's max rank caps at 40 after 5 polarizations - max rank increases by 2 per Forma added (similarly as the Paracesis).
• All Tenet weapons deal innate elemental damage in addition to physical damage. The amount of this damage is random, ranging from 25-60%, while the type of element is determined by the Progenitor Warframe, as per the table below:

According to the above, I added exactly 5 forma to this weapon, so we can obtain Mastery Points from it.

In this case, I recommend picking Heat as an elemental.

Let's get some facts about this rifle:
Full-auto mode:

• High Puncture damage – effective against armor.
• Good accuracy.
• Fairly slow reload speed.

Semi-auto mode:

• Very high base damage.
• Innate Blast damage – effective against Machinery and Fossilized.
• Fairly fast reload speed.
• Shots explode in an 8-meter radius on impact with a surface or enemy.
• High magazine size.
• Low fire rate.
• Explosion inflicts self-stagger.
• Explosion has linear damage falloff from 100% to 40% from central impact.
• Consumes 80 rounds of ammunition, effectively resulting in a 1-round magazine that prevents the semi-auto mode from being used in tandem with the full-auto mode and must reload after every shot.
• Projectile has heavy arcing.
• Projectiles have travel time.

Well... This weapon looks like a beast ... looks like or rather acts like a beast. It's up to you which fire mode you like more. Rapid-fire rifle or exploding grenades? I'll leave it to you to choose from, for me, both modes are great.

Bane of Faction mod is flexible, change it according to the faction you are up against, or simply put [Serration].

Enjoy, THeMooN85