Tuning FWB 124

[GoldenStateAIRGUNer]

Well, I figured out why I was getting severe blowby on the breech seal. The seal in the rifle wasn't even the right one. Just got a replacement for the FWB 124 today. Old one on the left. New one on the right.

Left--- .102" thickness. Right--- .120" thickness 

 

[GoldenStateAIRGUNer]

I'm waiting on some Air Venturi Moly paste and then the transformation will begin. I was getting 605 to 640 fps with JSB 8.44 gr. With this new seal I think 680 -700 fps will be possible. Keep in mind this is a soft tuned rifle. I'd be happy for 9 ft lbs....for now.