Wiktionary
vb. (context firearms English) To align the sights of a firearm.
Usage examples of "sight in".
The Zungomoro district was fading out of sight in the east with the last cocoa-nut-trees of that latitude.
They were hidden out of sight in the completed shelter before Kerrick issued his final instructions.
As the monster neared the lake, the water at the edges quivered, showing how its weight shook the banks at each stride, while stumps and tree-trunks on which it stepped were pressed out of sight in the ground.
This is a very common sight in side streets such as West Forty-ninth on nice days, and by no means unpleasant, if you like Mamas and their young.
Pugaliese's driver crouched down out of sight in his seat but a line of bullets tattooed across the door and killed him.
Ahead of them on the same road, another car similar to their own was just moving out of sight in the distance.
For a moment it slipped out of sight in the dark, but reappeared, walking more slowly.
His ship arose from the ground easily, and in five seconds was out of sight in the cloudless skies above.
On half-a-dozen charges at least he could be arrested on sight in as many capitals of Europe.
The sun was a rare sight in the days that followed, at best a dim reddish disk through the murk.