Front sight

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(Firearms) the sight nearest the muzzle.

See also: Sight

Webster's Revised Unabridged Dictionary, published 1913 by G. & C. Merriam Co.
References in classic literature ?
As he passed through the opening, the front sight of the rifle caught upon the edge of the inswung door with sufficient force to close it tightly after the fleeing ape.
To give them an edge Colt released its Target Model in 1894, a specialty gun with a flat top complete with drift-adjustable rear sight and removable blade front sight. The Target Model also had a funny-shaped grip.
It also has a 14-karat solid gold bead front sight and giraffe bone grips.
XS Sights is famous for pairing a big dot front sight with a V-notch rear sight, and the setup is extremely fast to use.
It has an adjustable comb, carry handle adjustable rear sight and standard front sight and comes with a five-round magazine.
The front's thinner fine-point front sight post is paired with an adjustment wheel built right into the sight tower to provide elevation adjustment, whereas, the rear's dual aiming aperture utilizes a side-mounted low-profile thumb wheel.
It will stretch your awareness of where the front sight travels during recoil, and you'll be able to press the trigger in unity with its path back to the target.
Another way to help see that pesky front sight on a pistol with aging eyes is to use a low-powered flattop or lined bifocal set or a higher-than-normal lens in the shooting eye side.
Twice now I have had the front sight come off while shooting.