Update 19.5 Bow Weapons ListWeapons in brackets are Variations on that Bow, so there is a Paris, Paris Mk-1and Paris Prime.
• Attica
• Cernos (Rakta)
• Daikyu
• Dread
• Mutalist Cernos
• Paris (MK1, Prime)
• Zhuge
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Unlocking WeaponsMk.1 Weapons you can buy for Credits from the Marketplace and provide quick replacements.
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.
Prime Weapons require Void completion, often high level Survival/Defense 'Rotation C' drops. These are endgame. I use
Primarch Prime Part GuideThe Rakta Cernos is a Red Veil Syndicate exclusive and requires MR12.
If you want to finish off Bows quickly then go with Mk-1 Paris and the vanilla Cernos.
Check here for required Mastery Ranks or the Marketplace.
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Leveling weapons to Rank 30The 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.