So I field stripped it to put my new M249 grip on, and was going to clean it...

Didn't clean it yet, but when I went to re-assemble, it now acts as though it's jammed...

I did not remove the cleaning rod when disassembling - but that shouldn't matter?

What stupid noob mistake am I making...? I am really, really tired, but I can't find anything out of place.
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