| 摘要 |
An iron sight for night, day time and transition light sighting having a luminous source for night sighting and an accurately defined circle of a predetermined thickness surrounding such luminous source for daytime and transition light sighting and in one form having the luminous source supported in a receiving bore by an elastomeric material with the luminous source being accurately centered in the elastomeric material which is of a predetermined desired thickness to provide insulation from shock loads and a desired thickness and accurate circular shape for day time and transition light sighting.
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