will be interesting to see how much of the current ION upgrades are compatible, i mean by the sounds of it, it has a newer grip frame, different thread feedneck and BOB, but no indication of new board, and with the ROF the same, we assume that the noid is the same. Also the barrel is probably unlikely to change, maybe a little lighter. It will be also intereting to see whether this is a full BOB or just a semi, if full the fire chamber might be able to take the inserts for the EPI, making that upgrade kit obselete. I think that people wont go rushing out to buy this, but rather upgrade their ION, which im sure SP are banking on.