This option parts set from Bandai includes everything you need to convert your Entry Grade 1/144 Strike Gundam into Launcher Strike Gundam or Sword Strike Gundam, and the set is also compatible with other HG items! 3mm joints and C-type joint parts are included that can be selected depending on the kit it's used with. The Agni is movable with a ball joint and 3mm joint; the Panzer Eisen comes with a lead wire.  You can also recreate Perfect Strike Gundam by combining It with the Gundam Option Parts Set 1, sold separately