Original FWB 124 factory piston seals are not made of a good material. Several aftermarket piston seals are much better material and should last much longer. If your 124 was resealed, it may not last long IF the new seal was of old stock oem seals, it may not last long at all. I’ve had a few 124’s both deluxe and sporter versions. The original seal just was of poor quality, but then it was developed in the early days of high performance spring piston rifles using synthetic materials instead of leather piston seals. The FWB is a high quality rifle, it just had this one part that is best when replaced with any of the new redesigned seals.
The AirGun Letter had a very good article(s) on some of the newest piston seals for the 124.
If your 124 has poor velocity, STOP shooting it! You may be hammering the piston face into the end of the receiver tube. Get it resealed and maybe a new spring. It’s nice to get a fitted mainspring guide and new lubricants too!
Last edited by Alaninga; 04/02/21.
