| 摘要 |
Improved devices for adapting revolvers for shooting practice with pellets. Advantages include qieter operation, no need of accesories for loading or unloading the primer and a universal size for cylinders of different lengths. A venturi passage separates the detonaing chamber from the bore, thereby accelerating and depressurizing the expansion gases and reducing noise. In one embodiment, the adaptor includes an internal cannon which is longitudinally displaced together with the pellet by the propulsion gasses. Improved adaptors are disclosed for pistols, for selfcentring a barrel liner and protecting rifling grooves.
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