Guide for assorted rail mounted front BUIS

[Stickman]

Yankee Hill Machine has released a new line of spring loaded BUIS. These sights are raised by pressing a button on the left side of the sight, and are spring driven into their locked upright position. Lowering the sights requires the user to press the button, and fold the sights back into their stowed position.

The front sight uses a standard M16A2 squared front sight post.