Okay good, I thought I was the only one who had trouble lol. Yeah I was a little too aggressive and rushed a lot but I'll change my play style on SS. I should be able to grab the last couple attachments on SS hopefully, because I have no idea what some of the under-barrel attachments were (bayonet, I assume). Thankfully I was able to find and unlock all the nanosuit modules

Now it's just a matter of grinding out their requirements!