Inventory space and repeat gear

To rank up weapons in SP you either have to level up to unlock the next rank to build in the research lab, or find in loot. Or for some weapons the only way to get them is to research and then make them in the research lab.

I think its every 5 levels unlock the next upgrade, then at some point it turns to 10 levels. The max level of a gun is 10 i believe, 6-10 unlock after you research the level V.

Every mod, every weapon, every armour piece, every stack of consumable every stack of salvage count towards your inventory.

Best to sell mods for weapons you don't use. Deconstruct all armour/weapons you don't use.

Im like 80% sure it counts. Could of sworn selling salvage frees up my inventory space.

Mods, Weapons and Armour. Not Salvage.

Yep when using the crates gained from apex missions the item you get will be linked to your level at the time of opening.

So basic crate = Bronze gear linked to your level
2nd tier crate = Silver/Gold gear linked to your level
3rd tier crate = Gold/Rare gear linked to your level

I've finished the game and I don't recommend deconstructing all weapons. Keep and sell half of them. You are not gonna get enough research points to research and make everything even if you have the angelic patience to scan every single piece of rock and alien tech you bump into. So if you want to mix and try many different weapons you'll need a good chunk of credits to buy them and weapons are worth a lot. Deconstruct everything else (armor, mods) since it's otherwise worthless.

Ofc if you're determined to play as a sniper your entire playthrough then credits are almost completely useless for you. Just make Black Widow or Isharay (the only good rifles on Challenging and Insanity) and go to town.

Is there a storage locker at least?

I deconstruct all gear I find in campaign, all of it. Better used as resources. I craft my own weapons and armour, have not once used anything I picked up via a dead body, a loot chest or just cause.

It does seem easier to level up certain things in MP though, bit nicer then ME3. Though I will say MP is definitely harder.

Saw someone say you don't get enough resources to research everything... not once did I believe the point of this was to research everything, seems a little silly! I research ALL augments, and choice selections from each group, IE weapon, armour. The Heleus armour works for body, legs and arms. Where as, for example, Remnant armour only fills your chest slot. Leaving legs and arms bare. 1 item vs 3 items.

Would kind of be the point on newgame+ imHo.

To poster above me, sadly you can't deconstruct mods. I get so many I find that I just destroy them all for the inventory space, as selling them for about 100~ credits each isn't worth the salt. Make money from salvage only, no worries there.

Edit: the Isharay sniper rifle is one of two weapons I crafted during my play-through, that and the P.A.W. When modded while crafting, it is very powerful. On Hard I was hitting Fiends for at least 40% one hit, with explosive shells (as a plasma/energy weapon).