Replacement piston and seal for old Daisy BB guns REPLACEMENT SEALS My latest Daisy order arrived today. In it was a couple parts originally designed for the Model 25 pump BB gun. I gambled these parts would work in my old style discontinued Model 104 from around 1970. I’m happy to report that these parts are the same, and my garage sale Model 104 will be back in service real soon! 130126-100 Barrel Seal ($1.00 130225-100 Plunger Head (piston) ($1.50) These are a direct replacement for the early steel trigger/removable shot tube style Daisy lever guns, ca. 1970 (possibly works in all except leather sealed guns). MAIN SPRINGS The 499B spring is different from the Red Ryder/Buck new model spring. Slightly bigger OD, more coils and smaller wire diameter. BTW, the 499B does not use an air tube. 499 B SPRING SPECS 7” free length 0.538” 0.9375” OD 0.078” wire dia. 34 coils PLUNGER TUBES Also found that the Daisy Model 499B plunger tube (169761-000 Plunger casing $2.00) has thicker “legs” than the new style Daisy lever guns: 0.345” vs. 0.330”. But not quite as thick as the old style tube, old being 0.350”. No photos, the differences in thickness are too small to see. The rear cross piece on the 499B plunger tube is also different. If it were to be used in a Red Ryder the anti beartrap wouldn’t work. It has no bottom “guides” so whether it’ll work in a Red Ryder remains to be seen, but if I had to guess, I’d say they will work. AIR TUBE Model 25 air tube (150272-100 $1.50) is same as Red Ryder air tube. REAR SIGHT I have been looking for an adjustable rear sight that could be used on the Daisy lever BB guns like my old style Model 104 and the new style Model 105 Buck BB guns that have the simple notch open rear sight that’s also the spring anchor. The 499B uses an aperture sight (169371-000 Rear sight group $3.00) that screws to the rear of the receiver. I’m going to see if it can be used on my old Model 104 by attaching it using the top, rear stock mounting screw. Non adjustable rear sight (Pyramyd Air) FRONT SIGHT Not sure what I’ll do about the front sight. Unlike the new type Daisies, the front sight on the old model 104 is spotted to the outer barrel tube. Daisy does carry the 499B front sight inserts (163912-000 Sight inserts (4) $1.00) but the 499B front globe sight housing is also part of the 499B outer barrel tube, so it's unavailable as a replacement part.