Remington 7400 Problems

The Remington 7400 is a gas-powered, automatic rifle that was manufactured from 1981 to 2004 in a large variety of calibers. The rifle is a reliable model, but problems do occur in the automatic ejection and reloading system. Breakdowns in the system require a thorough examination of the moving parts in order to locate the problem.

  1. Debris Jams

    • Jams typically occur in the Remington 7400 when the gun is not properly maintained. The automatic system struggles to eject and reload when rust and grime are present in the ejection port. Rust and grime accumulate from heavy use and exposure to moisture. Clean and dry the gun after each use to prevent the jamming. Inspect the ejection port and magazine assembly for rust and debris before each use and clean the metal surfaces with an oil cloth. Add solvent when the rust does not wipe off the metal face.

    Security System

    • The Remington 7400 has a built-in security system. The safety button contains a small slot that turns with a special key. The security system is engaged and the trigger locks when the small arrow is pointing at the white dot. The safety system is not engaged when the arrow points at the red dot. Always check the safety system before shooting and turn the arrow on the red dot. Many shooters engage the safety system, store the gun and forget about the key system. The gun will not shoot unless the safety is turned to the red position.

    Magazine Latch

    • The Remington 7400 stores rounds in a magazine. The magazine is pushed into place on the bottom side of the barrel and in front of the trigger guard. The magazine placement is obvious as the rectangular magazine is a perfect fit for the rectangular opening on the rifle. A latch automatically engages to hold the magazine in place when the magazine is pushed into the opening. The system will not catch and load the magazine rounds unless it is properly installed. Check the magazine when the rifle fails to reload and push the magazine into place to ensure the latch is engaged. The issue is minor and easily fixed by adding pressure in an upward motion. If the problem persists, the latch may require replacement.

    Moving Parts

    • The moving parts of the rifle are the most likely points where wear and tear will occur. Pull the two trigger plate pins to access the trigger assembly. Locate the spring on the hammer and the action spring that covers the action tube. Check for breaks in the metal and replace any broken springs. Clean and oil the trigger assembly, hammer and springs to maintain the gun and prevent malfunctions.