Hello there,

As per Wiki:

• Kuva Hek: Alternate Fire fires all four barrels simultaneously.
• The weapon's max rank caps at 40 after 5 polarizations - max rank increases by 2 per Forma added (similarly as the Paracesis).
• All Kuva 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 Toxin as an elemental.

Some facts about weapon itself:

• Innate multishot of 7 pellets.
• Alternate Fire shoots four shots simultaneously.
• Has linear damage falloff from 100% to 26.67% from 15m to 30m target distance (distances are affected by Projectile Speed).
• High recoil.
• Small magazine size.
• Alternate Fire consumes 4 rounds of ammunition, effectively resulting in a 1-round magazine that prevents the alt fire from being used in tandem with the primary fire and must reload after every shot.

Guys... do you want to know my personal opinion? This Kuva variant of [Hek] is SHIET! Like this one got more nerfs then buffs. Almost unusable on any fast mission, and as we know, every mission in this game is somehow fast.
I mean WTF DE?! 4 rounds, alt fire shots entire [Mag]? Almost 2 sec. reload? Are you mucking nuts, DE? I think you actually are! Take this shietty shotgun, put it onto your butt and pull the mucking trigger!

Anyway, we need 5 forma for MR fodder, so try to not die from boredom while exping this shietty shiet.
And... enjoy, I guess?
THeMooN85