ring-and-bead sight

ring-and-bead sight

[¦riŋ ən ¦bēd ‚sīt]
(ordnance)
Type of gunsight in which the front sight is a bead or post and the rear sight a ring.
McGraw-Hill Dictionary of Scientific & Technical Terms, 6E, Copyright © 2003 by The McGraw-Hill Companies, Inc.