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Air & spring

Diana twenty-one

Diana twenty-one — documented specs: caliber 4.5 mm (.177), barrel length 420 mm (16.54 in) (twenty-one FBB), overall length 1,160 mm (45.67 in) (twenty-one FBB), weight 2.8 kg (6.17 lb) (twenty-one FBB), capacity 1 (twenty-one FBB), muzzle energy at most 7.5 J (5.5 ft-lb) (DIANA twenty-one FBB). The source for each figure is listed below the specs (catalog as of 10/16/2026).

Category
Air & spring
Era
Present (from 1991)
Origin
Germany

Also known as: Diana twenty-one FBB


Specifications

Action
Spring piston
Sights
Factory scope
Barrel length
420 mm (16.54 in) · twenty-one FBB
Overall length
1,160 mm (45.67 in) · twenty-one FBB
Weight
2.8 kg (6.17 lb) · twenty-one FBB
Capacity
1 · twenty-one FBB
Muzzle energy
at most 7.5 J (5.5 ft-lb) · DIANA twenty-one FBB

Sources

Specifications come from the source cited alongside them; counts are based on our catalog as of the date stated. Not legal advice: what follows from these figures in a given country is decided by that country’s law. Waffenschrank is not affiliated with the manufacturers named.



Other models in 4.5 mm (.177)

Models from other manufacturers in the same caliber, drawn from the catalog in no particular order — not a recommendation and not a comparison of specs.


Related

Catalog as of