A sighting system for a firearm, comprising: a front sight; a rear sight; wherein the front sight further comprises: a first base; a first flip-up portion, the first flip-up portion comprising two front arms (108, 110) and a horizontal connector connecting the two front arms (108, 110), wherein the horizontal connector includes an aperture; a knob comprising one or more notches on a first side of the knob; a sight post extending from a second side of the knob, the second side of the knob opposing the first side of the knob, wherein the sight post is shaped and sized to extend at least partially through the aperture; at least one detent and one or more protrusions, the at least one detent and one or more protrusions arranged to face the one or more notches, and wherein the one or more notches on the first side of the knob are shaped and sized to interact with one or more of the at least one detent and the one or more protrusions; wherein the knob is configured to rotate about a first axis, the rotation causing: the sight post to move in a first direction along the first axis; tilting of the knob in a second direction, the tilting based at least in part on one or more of the at least one detent and the one or more protrusions interfacing with the one or more notches; and tilting of the sight post in the second direction, wherein the tilting of the sight post in the second direction forces at least a portion of the sight post to press against the aperture, and thereby reduce tolerance gaps between the sight post and the aperture. a front sight; a rear sight; wherein the front sight further comprises: a first base; a first flip-up portion, the first flip-up portion comprising two front arms (108, 110) and a horizontal connector connecting the two front arms (108, 110), wherein the horizontal connector includes an aperture; a knob comprising one or more notches on a first side of the knob; a sight post extending from a second side of the knob, the second side of the knob opposing the first side of the knob, wherein the sight post is shaped and sized to extend at least partially through the aperture; at least one detent and one or more protrusions, the at least one detent and one or more protrusions arranged to face the one or more notches, and wherein the one or more notches on the first side of the knob are shaped and sized to interact with one or more of the at least one detent and the one or more protrusions; wherein the knob is configured to rotate about a first axis, the rotation causing: the sight post to move in a first direction along the first axis; tilting of the knob in a second direction, the tilting based at least in part on one or more of the at least one detent and the one or more protrusions interfacing with the one or more notches; and tilting of the sight post in the second direction, wherein the tilting of the sight post in the second direction forces at least a portion of the sight post to press against the aperture, and thereby reduce tolerance gaps between the sight post and the aperture. a first base; a first flip-up portion, the first flip-up portion comprising two front arms (108, 110) and a horizontal connector connecting the two front arms (108, 110), wherein the horizontal connector includes an aperture; a knob comprising one or more notches on a first side of the knob; a sight post extending from a second side of the knob, the second side of the knob opposing the first side of the knob, wherein the sight post is shaped and sized to extend at least partially through the aperture; at least one detent and one or more protrusions, the at least one detent and one or more protrusions arranged to face the one or more notches, and wherein the one or more notches on the first side of the knob are shaped and sized to interact with one or more of the at least one detent and the one or more protrusions; wherein the knob is configured to rotate about a first axis, the rotation causing: the sight post to move in a first direction along the first axis; tilting of the knob in a second direction, the tilting based at least in part on one or more of the at least one detent and the one or more protrusions interfacing with the one or more notches; and tilting of the sight post in the second direction, wherein the tilting of the sight post in the second direction forces at least a portion of the sight post to press against the aperture, and thereby reduce tolerance gaps between the sight post and the aperture. the sight post to move in a first direction along the first axis; tilting of the knob in a second direction, the tilting based at least in part on one or more of the at least one detent and the one or more protrusions interfacing with the one or more notches; and tilting of the sight post in the second direction, wherein the tilting of the sight post in the second direction forces at least a portion of the sight post to press against the aperture, and thereby reduce tolerance gaps between the sight post and the aperture.