I`ve just got back both FWB 124 and 127 rifles from the tune they went in for.
I was told that the new piston head and breach seal, sourced from Chambers, were , by the looks of things, Chinese production and rubbish. The 6 week old piston seal had a split in it already( 127) and the breach seal was incorrect in size.
I took both rifles to a well respected tuner, Nick Simmons ( FWB Sport forum) over in Derby.
First impressions are that these two old classics are brand new again, so silky smooth it`s unreal
I`ll scope them up today and see just how good they really are before they have even bedded in.