QB78 / QB79 / XS78 / TH78 Barrel O-Ring Seal Kit – Replacement Part #2700

Got a QB78, QB79, XS78, or TH78 that’s leaking air?

This is the exact barrel O-ring seal kit you need, part #2700.

They’re brand new, still in the original packaging—just as you’d expect from a retail store.

Since these are unbranded and the manufacturing origin isn’t specified, they’re a solid budget-friendly fix for your air rifle.

No fancy frills, just the right seals to get you back to shooting.

Whether you’re doing a full refurb or just swapping out worn rings, these should fit the bill.

Double-check your model before ordering, but if it’s one of the listed ones, you’re good to go.

No MPN or UPC included, so don’t stress about that—it’s pretty common with generic parts like this.

If you’ve been searching for QB79 barrel seals or QB78 replacement parts, this is exactly what you need.