I broke one of my Luminoks while twisting it out. You aren't supposed to twist or you break the contacts. So I went to my local BPS to pick up another one. They are built differently now. I was wondering if they weighed the same or not so I put both types on my grain scale. The average weight of the older style is 33 grains. Some of mine were 32, some 34. The new style nock weighed 23 grains. I think that is better in regards to FOC. The only thing that concerns me is now I have to either find an old style or buy all new ones to keep my arrow weights consistant. [&:] I will post a pic of the two tonight when I get home.