It's roughly 20mm longer and a shade heavier, I didn't weigh it unfortunately and the diamond was mounted on a HW100k as opposed to my S, so it's difficult to give a precise answer, but it is slightly heavier!
Do you mean slightly heavier than a Nighteater or heavier than a 35 - 40 ozs 'big' Nikko? If the latter ...... fork me, that's substantial. Regards ... Geek
PauL H. - Shotgoon
Brownings: 1999 Ultra XS; 2004 B525 Field; 2010 Maxus Hunter: Air Arms 1998 Mk.2 Pro-Target, 2001 Mk.2 Pro-Sport & 2003 S400C