| 摘要 |
A metal sight rib has in its bottom a dovetail groove received with a slide fit on dovetail projections on spaced and aligned upright posts on a shotgun barrel, with the groove having wedge formations bearing against the opposite ends of the dovetail projections on selected posts for locking the sight rib to the latter, and a method of thus mounting the sight rib, involving sliding the same into fit with the dovetail projections on the posts, and crimping the sight rib inwardly at the opposite ends of the dovetail projections on selected posts for wedging the sight rib to the ends of these projections.
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