Rebuilding two FWB124D's, one low on power and shoots erratic
The other would cock and not Fire at all and actually had pellet stuck in barrel.
After tearing both down it was apparent that both had bad piston seals, the one was totally
disintegrated. Both guns getting thutough cleaning and deburred, trigger jobs, JM Pro Mac Kits, new safety springs
and correct lubes.
I already finished one and shoots 7.9 CP's
@ 855 fps and is laser accurate. I'm talking dime size groups at 50 yards in dead calm conditions.
The other is waiting on JM kit, wanted to install one first and see how gun turned out.