| 摘要 |
The testing rifle has an adjustable butt divided into front, middle and rear parts, with a cover attached to the rear part. The middle part hinges on the front part about a vertical axis and is lockable, and also hinges on the longitudinal axis of the butt. The rear part can be raised, lowered and tilted in a vertical plane in relation to the middle part. The cover can be extended in the longitudinal direction in relation to the rear part. |
