Back-up sights with compact aperture, centering sight post, and miniaturized windage detent mechanism

A flip-up aiming sight for use with a firearm, the flip-up aiming sight positioned near a distal end of the firearm, the flip-up aiming sight comprising:

• a base for attachment to the firearm;
• a first arm and a second arm, the first arm and the second arm positioned on opposite sides of a longitudinal plane through the firearm;
• a horizontal connector for connecting the first arm and the second arm, wherein the horizontal connector includes a first aperture, the first aperture having a plurality of angled faces;
• a second aperture, the second aperture formed by the first arm, the second arm, and the horizontal connector;
• a knob, the knob positioned within the second aperture, the knob comprising:
• one or more notches on a first side of the knob;
• a sight post, the sight post extending from a second side of the knob, and wherein at least a portion of the sight post extends through the first aperture;
• wherein the second aperture comprises at least one detent and one or more protrusions, the at least one detent and one or more protrusions shaped and sized to interact with the one or more notches when the knob is rotated;
• wherein the knob is configured to rotate about a first vertical axis, the rotation causing one or more of:
• tilting of the knob based at least in part on the at least one detent interfacing with one of the one or more notches;
• and
• tilting of the sight post in a direction along a longitudinal axis through the firearm, wherein the tilting of the sight post forces the sight post to press against one or more angled faces of the first aperture.