I just got my Powerfeed plug in today and I am really liking it. Yes it is a Parabolic powerfeed plug. For those that dont know, older mags came with a plug that didnt allow maximum flow of paintballs. These had a little step on the round part of the plug. Airgun designs later corrected the feeding issue with the parabolic plug. These plugs from Titus are completely aluminum "Anodizable", come with the oring, and are just like the newer plastic automag plugs for the same price. If you have a powerfeed marker, get this piece!