FWB 124D

[cnjl3]

I saw over on the "yellow classifieds" a 124D for sale that has a "longer stroke for greater air volume sweep." I emailed the seller for either a link or more info but so far no reply. I googled it and didn't really locate an answer. Has anyone ever heard of this mod? Inquiring minds want to know.

[Nod]

I can't imagine what he means, but if you hear back let us know, I'd be interested on how he did it.

[Motorhead]

A modified 124/127 such as that i would be VERY cautious .... JMO
They already were classified as a long stroke action IIRC ?

With major mechanical parts long ago obsolete, and 124's being so sought after ... if it was so successful with such a mod ... need to ask WHY is it being sold ?

[linoww]

I know the seller and he is 100% reliable .Larry Durham did the modification so its good to go.

George

[cnjl3]

I wasn't trying to drag anyone over the coals, I just wanted to read up on the mod/method that was used. I always read about seals, mainsprings, metal triggers, muzzle brakes, lubes, stocks - you know the usual list of modifications done to almost every air gun/rifle. But this sounds different and I was just wondering what was the advantage gained.

[Nod]

Other than shortening the piston, what else can you do to gain volume?

[Motorhead]

Other than shortening the piston, what else can you do to gain volume?

Thats it ....

[cnjl3]

Wouldn't the length of a parachute piston seal compared to maybe some type of o-ring seal also yield a shorter piston/seal scenario? I'm very happy with the JM seal/mainspring/lubes that I used in my own FWB124D. But I like reading about any and all types of mods for the old FWB124. I'm left wondering if this mod yields accuracy, speed or both or none.

[Calmark]

It seems to long stroke a FWB 124, you'd have to either shorten the piston latch rod, or as you say Carlos, decrease the length of the piston seal buy cutting it down or running an o-ring seal.  I've read of this increasing power potentially, though the larger bore rifles seem to get less of a bump than say smaller rifles with 25mm tubes.  I'd be curious to know exactly what was done to that FWB 124 too and which route the tuner went.

[Nod]

Yes, I'd like specifics on what was done. You would have to change the length of the cocking arm if you changed the size of the piston and/or seal. I doubt that there is much you can do to increase air volume without major changes.