Warframe

Update 19.5 Heavy Weapons List

Blade
• Galatine
• Gram
• Scindo
• Scindo Prime
• War
• Zenistar (Unlocked after logging in 300 cumulative days)

Hammer
• Fragor
• Fragor Prime
• Heliocor
• Heliocor Synoid
• Jat Kittag
• Magistar
• Magistar Sancti
• Sibear

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Unlocking Weapons

19.5 Update:
You can unlock Fragor blueprint by completing the Mars Junction on Earth.

Most Heavy Weapons have blueprints in the marketplace, War is a reward from a very high level questline involving the Stalker and you'll get Broken-War (Sword) first. Gram is recommended and compliments Rhino Warframe well.

Lot's of weapons require a Mastery Rank, but by leveling weapons you increase your Rank so this shouldn't be a problem, just make sure to Rank up regularly.
Check here for required Mastery Ranks or the Marketplace.

Prime Weapons require Void completion, often high level Survival/Defense 'Rotation C' drops. These are endgame. I use Primarch Prime Part Guide

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Leveling weapons to Rank 30

The best way to level weapons is to play Survival or Defense missions and kill lots of enemies, then extract for the bonus exp, you'll get lots of weapon mastery whilst unlocking all worlds, doing alerts, unlocking other achievements and just playing the game. Remember to always swap for you next weapon and have one ready to swap.

Lots of Dark Sectors have Affinity bonus (+Shotgun), use a Warframe that supports you but doesn't really kill enemies so you rely on your weapons, being in a group spawns more enemies for more exp.

Elara on Jupiter is a great mission for Affinity, as the anti-moas spawn early and often, and they give a fair amount of affinity around 7-9x the exp of grunts.

There are no Heavy Weapons you can pick as Melee weapon in the begin of the game. You can buy blueprints from 4 Heavy weapons with in-game credits from the Market on your ship.

The weapons are: Fragor (Hammer), Galatine (Sword), Gram (Sword) & Scindo (Axe).

UPDATE: The Seeker is considered a Shotgun. This is the weapon of the Carrier Sentinal.

I made the Fragor a heavy hammer , there's no heavy weapons on the store to buy directly with credits, then what i did, and it's working with all the mastery achievements, is when you are close to level 30 with any weapon go to any mission and immediately when you hit level 30 close game. Repeat that process one more time and you will earn the achievement.

You can check the progress on the achievement tab to see if it works :).

***This has been fixed in update 17****

There is apparently a glitch that happens in the game where if you click last mission results you can potentially get all the master achievements for that specific slot (ex. Primary, secondary or melee).

In order to get this glitch to work you have to finish a mission and ONLY when the weapon levels up from 29 to 30 in the end mission screen will this glitch work.

When this happens usually you should get the proficiency achievement if you have not gotten it and the mastery achievement for that specific weapon.

So when you return to your ship go to the back and equip a new weapon in the same slot that you just leveled up to 30 with the previous weapon. Now click the menu button and navigate to the last mission results option. When the screen pops up both achievements should pop for that weapon you just equipped. Rinse and repeat for the others you are missing in that category.

If you level up the weapon during the mission instead of at the end of the results screen this glitch will not work.

PS. If your weapons is a 29 and really close to leveling up or about half way. Go to a void mission and do one of those because it usually gives you a good amount of experience to be able to hit that 30 when the match ends.

Leave any comments on how this helps you and please if voted negative let me know. Good luck

Thanks LSK ArchDeific for proving this works