UIT rail


The UIT rail, also known as Anschutz rail, is a standard used for mounting slings and other gun accessories in competition shooting, and is essentially a T-slot track shaped aluminium extrusion profile accepting attachments in the form of T-slot nuts, or similar.
A similar design is called Freeland rail, but the dimensions of Anschütz and Freeland rails differ. The Anschütz rail is wide and shallow, and the Freeland is narrower and deeper. Accessories made for one of the two types are not necessarily compatible with the other.

Dimensions

Dimensions below are approximate.
DescriptionAnschütz Anschütz Freeland Freeland
AInternal width of opening10 mm0.400 in8.4 mm0.330 in
BInternal width bottom13 mm0.512 in11.4 mm0.450 in
CTotal internal height4 mm0.160 in
DInternal track height2 mm0.079 in
EExternal height7.4 mm0.290 in10.2 mm0.400 in
FExternal width22 mm0.870 in16.3 mm0.640 in