FWB 300 Troubleshooting Video

JoeW - I watched your two videos on dis and reassembly of your 300s - they were really informative - thanks for those! It would be helpful if you could cover the actual replacement of the piston buffer and breach seal. I think there may be an o-ring hiding in there somewhere too. Are there any more "consumable" parts that need replaced besides these? I believe you also told me that the small sledge spring sometimes needs replaced.

I can't believe this post Joe, I just sent you a PM about this subject before looking at the forums.

I came across an interesting post from a few years ago on the subject. Here's some of the things the OP posted to watch for......
Cracks in the wood behind the trigger guard. You want to make sure the recoil sled works , and check the crown and see if it has had a steel rod used for cleaning and you'll see a shiny area around the crown if the cleaner wasn't careful. 

He went on to say, Check out the breech seal and see if it's red, green, or blue would indicate a newer seal. If you look past the breech seal and see the bumper, if it's a nice bright white, green or red it would indicate it has been replaced also. Wouldn't hurt to check the cocking arm and make sure it hasn't been racked on anything. The trigger carriers have been shown to break if someone manhandled installing the trigger blade , or failure to remove the blade while disassembling and racking it on something. 

The above was copied from the OP post and hope there might be something of use for you.

Joe you could get real scary and take the piston ring off? A fwb300 has a metal ring on the piston that works like a ring on a piston in a gas engine. They have been known to break when prying them off. And you could show some close ups of the bear trap and how it works and how it can get out of alignment when you take it apart and putting it back together. 

Outstanding video Joe. Really enjoyed it.

Great video Joe! I need to go by Tandy leather and you get a leather mallet.