SG (MG Spring Version)
Spin Gear Core: SG (MG Spring Version)
Jumping SG with a sharp tip, narrower than SG (Spring Version), and generally worse, with poor balance.
Has poor balance with most setups which only worsens when its gimmick activates, making it taller, worsening its balance and also throwing it off balance.
There is a magnet located in the tip section, however this has no effect on performance outside of Magne Stadia.
However, the shaft is better than SG (Spring Version) in the most critical way: It can extend in Jumping Base 2, which means it is required for competitive use of that Blade Base.
While its own shaft piece can be used in SG (Spring Version) if one finds one with a removable tip, the inverse is not true and will damage the tabs of that shaft if attempted. This setup provides a lower height for slightly better stability in Jumping Base 2 combinations.
Spring strength appears to vary across SG (MG Spring Version) and SG (Spring Version) examples. SG (MG Spring Version) generally comes with a stronger spring, though this is offset by the longer casing reducing tension somewhat.
Lower tension springs reduce the bounce strength, which helps avoid self-KOs on bounce sometimes, though with rulings no longer requiring the gimmick to be set this is of less concern.