Without seeing your FWB I suspect it is in need of serious repair. Unless you are mechanically minded and have the correct tools, including a spring compressor, I believe you should pack it up and send it to a experienced tuner. Having a professional take care of it will ensure this timeless weapon sees many more years of service. If you are going to attempt a repair yourself PM or email me, I will get the entire shop manual to you.
arathol - 3/4/2010 7:33 PM
The blade is a separate unit, easily replaced. Follow the link above, its likely the only source for a new trigger.
LongIslandArcher - 3/4/2010 9:05 PM
I recently took apart and repaired an FWB Sport124 air rifle that was 32 years old. You definitely need a spring compressor that can back out the trigger assembly a good 4" to 5" back from the receiver tube. It has a long spring (well, the one I worked on did anyway), and was one of the first 800+ fps .177 cal. air rifles.
Graham - 3/5/2010 2:58 AM
Scroll down on this link, and you will see a brand new trigger blade in it's packet. SEPERATE!
http://www.pyramydair.com/blog/2010/03/shrine-built-for-feinwerkbau-124-part-1.html