Vertical tags r very unique but in these kind of tags id say placement of the stock and the flow of the effects need to be just right for it to look very nice. im not saying its bad but a little more effects to the stock like in ur tag in ur signature. The blaze on the feet. And the word XIO doesnt show that well. Or u can blned the sprite in with the backround. Edit: My bad u changed the tag, After i posted. When i entered the thread it had a vertical one. Anyways. i dont like the fact theres too much purple. Maybe a little pink or some kind can be blended with the purple without hurting the sprite and effects to make it a little better.
You have some really great colors going on the last one, just work on some more action and effects and it would be grea.t