Hi
Hope this helps:
with specs , pics and info:
http://www.co2air.de/wbb3/index.php?...onItem&id=1072
5G is the normal LP5. The LP5 magnum is longer, heavier. It actually shares the same spring as the 21 rifle! Its stíll 7.5J/6Ftp though, so the velocity gain isnt thát much.

For targetshooting I would forget the LP5 magnum, too large, tooheavy for 1 handed.
Dont forget to look at the LP6 and 10 for oldfashioned target shooting!

PS I know of only óne shop to máke wooden grips for the LP5 magnum. In the US. For, iirc $80/90. Dunno bout the normal LP5. They might be easier available, allthough no 'real'matchgrips, more tempest-like combat wooden grips. The LP10 has target grips as standard.