FWB Sport modified internals

[deejayuu]

Had a peep through the cocking slot and had to a have a proper look. Anyone recognise the signature.
Non standard spring 270 mm x 21 x 3.5 x 31.5 coils x 38 lb.f/inch rate.
60 mm pre load. TP < 3 mm
Black seal, nice scarf joint to bearing ring which is tight in the groove.


Thanks for looking

[deejayuu]

Quick update with a Titan1 for comparison

[Shed tuner]

neat mod, well executed. weight the piston too - it's likely to have had a haircut. stock is 350 g IIRC (have it written down someplace)

[Garvin]

Lovely job. I've seen a couple of badly lubed Sports where there was galling inside the cylinder from grit or something at the rear of the piston. I'll bet it's smooth to fire?

[deejayuu]

Strangely Garvin just picked it up to shoot in the garage and didn't like it at all. Quick chrono meant it needed to come apart.
Spring/guides/seal are good fit lots of spring noise.
I'm no tuner but mine are more comfortable methinks. Bringing power down and fitting original spec. spring next.

[Shed tuner]

beer can piston sleeve

[Garvin]

Strangely Garvin just picked it up to shoot in the garage and didn't like it at all. Quick chrono meant it needed to come apart.
Spring/guides/seal are good fit lots of spring noise.
I'm no tuner but mine are more comfortable methinks. Bringing power down and fitting original spec. spring next.

Shame. Hopefully a piston sleeve and/or original spring will make it smoother.

Although I've heard several times that the original long spring is nicer to cock and shoot, but I have the shorter (stiffer?) Maccari Arctic spring in mine and it's fantastic at around 11 ft/lbs, especially with an old-style wide Maccari alloy trigger. (See Phil Bulmer's strip in the December 2006 AGW).

[Shed tuner]

just find a longish spring that's a decent fit on the guide, and sort out any rattling in the piston with a sleeve. They don;t need much tuning.

[keith66]

I always found that my old FWB sport (a.22) used to go through factory springs in pretty short order, about 2 years & that was their lot. Preload was huge & It made the rifle twangy as hell. Picked up an old school Maccari kit & it just drops in, push breechblock home & put the bolt in, easy peasy. Rifle was completely transformed, quieter, smoother & more accurate, power was spot on. No way would i go back to any longer spring.

[gtfreight]

I always found that my old FWB sport (a.22) used to go through factory springs in pretty short order, about 2 years & that was their lot. Preload was huge & It made the rifle twangy as hell. Picked up an old school Maccari kit & it just drops in, push breechblock home & put the bolt in, easy peasy. Rifle was completely transformed, quieter, smoother & more accurate, power was spot on. No way would i go back to any longer spring.

My 124 has a V-Mach kit in it which has a short spring, you could fit it without a compressor. It too is very smooth.

[Vernal]

My 124 has a V-Mach kit in it which has a short spring, you could fit it without a compressor. It too is very smooth.

And very nice to shoot yours is, I know from experience, but for me it is still a toss up between that and the standard set up in mine.