.303 British Scope Mount Instructions

Written by peter timm
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.303 British Scope Mount Instructions
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The Enfield .303 rifle was the primary battle rifle of the United Kingdom in both World War I and World War II. Surplus Enfield rifles are popular among sport shooters because of their low cost and reliability. Many shooters modify their Enfield rifles by replacing the military stock with a sporting stock. Attaching a modern scope to your Enfield rifle can be quickly done by replacing the rear sight with a rail mount. With a rail mount, you can quickly attach a scope equipped with tactical scope rings.

Skill level:
Moderately Challenging

Things you need

  • Pin punch
  • Small hammer
  • Rail mount for Enfield .303
  • Scope with tactical scope rings
  • Flathead screwdriver

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    Installing the Rail Mount

  1. 1

    Unload any ammunition from your rifle.

  2. 2

    Place your pin punch on the pin that holds the rear sight in position and use your small hammer to lightly tap it out. Lift out the rear sight and its components.

  3. 3

    Position the rear of your rail mount into the gap that held the rear sight.

  4. 4

    Screw in the two 6-32 x 1/2 cap screws (supplied with the rail mount) on both sides of the rail mount but do not completely tighten.

  5. 5

    Screw in one 8-32 x 1/4 set screw (two are supplied with the rail mount) into the hole in the mount (located near the front of the mount) 90 degrees from the bore centerline. Hold the mount in position while you're tightening the screw.

  6. 6

    Screw in the second 8-32 x 1/4 set screw into the second hole in the mount that's 45 degrees from the bore centerline.

  7. 7

    Finish tightening the two 6-32 x 1/2 cap screws at the rear of the mount.

    Attaching the Scope

  1. 1

    Remove the top halves of the scope rings by unscrewing the retention screws on the tops of the rings, along the sides. Place the scope in the rings and screw the top halves back on but do not completely tighten.

  2. 2

    Loosen the retention screws located at the base of the scope rings so the mounting brackets can be spread apart.

  3. 3

    Place the scope rings on the rail mount with the retention screws parallel and inside one of the slots that are cut across the mount.

  4. 4

    Align the sides of the bracket with the sides of the rail mount and tighten the screws by hand. Use a standard flathead screwdriver to turn the screws an additional quarter turn. Do not over-tighten.

  5. 5

    Adjust the position of scope so the crosshairs appear straight across and straight down. When in position, finish tightening the screws on the scope rings.

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