Fits most HW-Weihrauch spring and gas ram guns.
Even replaces leather units.
Fits HW 25,30,35,50,55,80,85.90,95,99- Beeman R1, R6,7,8,9,10,11.
Can replace those in the HW77,97 range for better lock up. Also Marksman 28, 50-55 series, 60 and 61 etc.
Does not fit the .25 barrel for R1-80. Fits the other calibers however.
Since factory breech slots vary by 6 thou or so. You can sand the bottom of the seal for a better fit. However all seals set and shrink by heat and use. Most new gun seals are softened or shrunk by oil or bluing salts.
Apex/maccari