Bud, I don't know if it's the picture or just me, but that sure looks like a 16" carbine barrel to me and a mix of parts. I believe I see a couple of carbine length free float tubes and a set of rifle length handguards, a carbine length gas tube and rifle length buffer/spring. Is that a barrel nut in the plastic bag?
If that is what you traded a working Spike's carbine for, I don't know. Unless you are getting other parts that aren't in the picture, you're going to need a proper buffer/spring for the stock that you have, buffer tube, upper parts kit, lower parts kit, gas block, and a muzzle device. I don't see a charging handle either.
Honestly, I really don't think that setup that you have, once you get it together, is going to do anything that the Spike's couldn't have done.
Man, I'm not trying to be contrary or abrasive or anything, but I don't think that I would have made that trade. Of course, it could just be the pic.