If you cast Nystul's Magic Aura on a magic item to make it appear non-magical can you then place an Infusion on it?

Is there a way to get an Infusion on a magic item?

There is an Infusion that ignores the loading property of the weapon you Infuse.

So I was hoping there was a way to Infuse a magic weapon.

I always thought that Nystul's Magic Aura allowed you to mask a magic item so that things like Detect Magic, Glyph of Warding, and Symbol treated it as a regular item.

Was hoping something like that worked with Infusions.

I was going to multiclass so I could do the Infusion myself.

Wanted to get that infusion on a Two-Birds Sling 

Maybe a wish... or limited wish?

elven fighter champion with elven accuracy and sharpshooter and action surge for 16 attacks with a good chance at a crit on each of the 16 attacks

plus all the fun of watching your sling bullets or stones bounce off enemies and hit other enemies

is each attack a possible 2d4+15 so an average of 20... that's 20 x 16 for a total of 320 average.

multiclass with assassin for guaranteed crits maybe?

A homebrew that worked for me with my DM was that he let me infuse magic Items like weapons or Armor, but there is no stacking. So if I got an +1 Crossbow and Infused it with the reating Shot property it would still be only +1 but has the repeating shot ability so I can use it without ammo and don't have to reload. That seems to keep things balanced and it gives me and my DM the ability of having non high tier magic weapons without them being practically useless because the infusion would be better. All of this is homebrew of course.

I don't even care that much about all the other stuff, just want to get rid of the loading property on the Two-Birds Sling so I could use extra attacks with it.

Maybe even a homebrew feat similar to Crossbow Expert but for Slings.

As stated, you don't need an infusion or feat to use extra attacks with the Two-Birds Sling.  You can just do that, so long as you have a sufficiency of sling bullets.  That doesn't make it a good weapon, but it does need you don't need jank to make it a less bad one.

Stoutstein and Yurei1453, thank you so much. For the past few days I was under the assumption that the sling had the loading property.

Almost gave up on the idea until I saw that Infusion and was trying to make it work. I don't need the Infusion any longer... or Artificer for that matter.

Originally when I saw the Two-Birds Sling and that it could do ricochet attacks I began imagining a sling bullet or stone bouncing off one target and hitting another.

It's very situational to actually have targets close enough to optimize this with extra attacks and other stuff. But then again, when not facing one big bad guy but a bevy of foes, or the bad guys minions the ricochet attacks will be fun.

Quote from Brian_Avery >>

Is there a way to get an Infusion on a magic item?

 I believe that an armorer can infuse their armor, even if it is magical. It says "You learn how to use your artificer infusions to specially modify your Arcane Armor. That armor now counts as separate items for the purposes of your Infuse Items feature: armor (the chest piece), boots, helmet, and the armor’s special weapon. Each of those items can bear one of your infusions, and the infusions transfer over if you change your armor’s model with the Armor Model feature. In addition, the maximum number of items you can infuse at once increases by 2, but those extra items must be part of your Arcane Armor." Specific (you can infuse your armor) overrides general (you can't infuse magic items).

I'm not sure where you're getting the idea that spiked armor is a weapon. It's pretty clearly not. You can make weapon attacks with things that aren't weapons. It doesn't happen often but it happens. Improvising weapons is the most common example. A chair isn't a weapon, but if you're going to swing it at someone that's a weapon attack. But anyway, only Battleragers can even use the armor to deal damage -- it's not a property of the armor, it's a class feature.

Anyway, you can't apply infusions to magic items. So if you buy "cold armor," even after separating it using Armor Modification you can't infuse it at all.

I got an infusion question.

If i can replicate any item from that list, does that mean i got the blueprint of the item?

Which mean i have the knowledge to craft it?

Quote from The_Traveling_Cleric >>

I got an infusion question.

If i can replicate any item from that list, does that mean i got the blueprint of the item?

Which mean i have the knowledge to craft it?

 That would be up to your DM. I would say yes.