This rail is 6.934 inches/176 mm long, .433 inch/11 mm thick. It has 17 Slots. It has a total of five (5) through holes sized to take 10-32 screws. The diameter of the counterbores are .488 inch/12.4 mm, which is sufficiently large to take 1/4-20 or 1/4-28 button Head Hex screws. To use these rails with 1/4 screws simply enlarge the diameter of the through holes.

The five holes are distributed 1.576 inch/40 mm apart from center to center of holes. This rail will mount to the bottom of our F.A.S.T. chassis fore-ends.

Look through the pictures to see a technical drawing of this rail.