Definition

Noun: A type of rear gunsight used on firearms, characterized by an adjustable eyepiece with a small aperture (hole). The shooter aligns the front sight and the target by looking through this small aperture.

Usage

The "peep sight" is mounted near the shooter's eye on the rear of a firearm. It is used for precise aiming by creating a consistent sight picture. The shooter looks through the peep sight's small hole to focus on the front sight, which is then aligned with the target.

Examples

• The rifle was equipped with a peep sight for improved accuracy at long range.
• He adjusted the diopter on his peep sight to match his vision.
• Many target shooters prefer a peep sight over an open rear sight.

Advanced Usage

• Technical Adjustment: Peep sights often allow for windage (left/right) and elevation (up/down) adjustments to calibrate the point of impact.
• Conceptual Use: The term can be used metaphorically to describe any small, precise viewing aperture, though this is rare.
  • The device functioned like a peep sight, allowing only a narrow, focused view of the specimen.

Variants and Related Words

• Aperture Sight: A more general term synonymous with "peep sight."
• Diopter Sight: A type of peep sight, often used in target shooting, with a highly adjustable eyepiece.
• Ghost Ring Sight: A variant with a very large aperture for rapid sight acquisition, often used on tactical firearms.

Synonyms

• Aperture sight
• Receiver sight

Antonyms

• Open sight (a type of rear sight that uses a notch or groove instead of a small aperture)

Related Phrases/Idioms

(No common idioms or phrasal verbs are directly associated with this specific technical term.)

Noun

1. rear gunsight having an adjustable eyepiece with a small aperture through which the front sight and the target are aligned