The screenshot above shows what I ordered. As of right now, all dissipators that PSA sells are midlength on their website. Never saw a carbine one. If what I had ordered said carbine, I would not have purchased it, as I don't trust carbine gas systems. Only carbine length I own is an Adams Arms.
I'm going to call again tomorrow. I think it might just be a mixup, but apparently it's happened to a few people which has me worried