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Spring-Piston airguns generate heavy recoil and vibration in both the forward and rearward directions. Most rimfire and centerfire riflescopes are made to withstand only the rearward recoil of these types of rifles.
Airgun scopes are made to withstand heavy bi-direction recoil and vibration. They typically also have parallax adjustment that allows closer focus. Typically these adjustments will allow focusing down to 10 yards. Recoil is typically not a problem with pneumatic airguns.