Those of us who build gunpla models would know that Bandai is well known for reusing its model parts to roll out new model kits. I have mentioned the 1/35 Lancelot series from Code Geass a short while ago, but that is only a small example of its common strategy. Today I present you the 1/100 Master Grade (MG) Strike Gundam series from the Gundam SEED universe.
Aile Strike Gundam, released in October 2003
Comes with a launch catapult which is pretty cool as a stand.
Strike Rouge, released in September 2004
Pretty much the same as the previous release (including the launch catapult) but with pink/red colour scheme.
Strike Gundam IWSP, released in October 2006
Same Gundam but with a different Striker pack and a darker blue colour. Comes with a normal action stand, which is the one for the newer releases as well.
Strike Noir, released in March 2007
A more orignal design and also my favourite out of all Strike Gundams, but it is also the only one without a stand of any kind.
Strike E IWSP, released in February 2008
Combine Strike Noir with Strike IWSP with some recolouring and you'll get this.
Launcher & Sword Strike Gundam, released in April 2008
Same Strike Gundam again, but finally with the other Striker packs that some fans have been waiting for a long time. It is also the most expensive one out of all MG Strikes.
I personally like Strike Gundam's design, despite it being a remake of the original RX-78-2 Gundam, but I would get tired of seeing the same model with different equipments over the years; I mean, that's 6 Master Grades for the Strike Gundam over four and a half years, or 7 if you count the event-limited "Deactive Mode" of Aile Strike Gundam as well (thanks you SEVEN6398 for mentioning this on dannychoo.com)!
This is one of the most re-released MG Gundam I have seen after the RX-78 Gundams (which has a lot more variations). Bandai is trying pretty hard at milking the money out of its customers by releasing variations and variations of it, mainly because of its Striker packs which are exchangeable with other MG Strike models. On a side note as mentioned by フェイダムさん, the Striker packs are also compatible with the later MG Impulse Gundam via an adapter piece (but no place for the shoulder equipments of Launcher and Sword pack), making the previous MG Strike seemingly more buyable. Unfortunately, the Force silhouette of Impulse is not backward compatible with the Strike(s).
I have a feeling that the remaining variations such as the Lightning and Gunbarrel Strike Gundam can be potential candidates for MG release too, but that could be too far-fetched for the modelling empire. Whatever you do Bandai, just don't get us started on the Raigo Speculum Gundam; that thing is deem to be a failure upon first sight...
All boxart images are from Hobby Search