How to Mount a Receiver Peep Sight and Rear Slot Blank ~ 336 Marlin Deluxe Upgrade!

Published on September 16, 2022
Duration: 29:49

This guide details the installation of a Lyman Model 66 LA receiver peep sight and a Marble rear slot blank on a Marlin 336 lever-action rifle. It covers removing the old sight, fitting the new blank using filing techniques, applying cold bluing for rust prevention, and mounting the peep sight. The process emphasizes careful alignment and fitting to ensure proper function and a clean aesthetic.

Quick Summary

To install a Lyman peep sight on a Marlin 336, first remove the old rear sight by tapping it out in the direction of brass ejection. Clean the dovetail slot, then fit a new blank by filing its underside and sides until it taps snugly into place. Apply cold bluing to the blank and slot for rust prevention before mounting the peep sight base and the sight itself.

Chapters

  1. 00:00Introduction: Lyman Peep Sight for Marlin 336
  2. 00:32Tools and Materials Required
  3. 02:56Preparing the Receiver: Removing Blank Screws
  4. 03:58Unboxing the Lyman Peep Sight
  5. 05:57Cleaning Receiver Thread Holes
  6. 07:04Mounting the Peep Sight Base
  7. 08:45Sliding the Peep Sight onto its Base
  8. 09:17Initial Alignment and Aperture Installation
  9. 09:56Securing the Rifle in a Vise
  10. 10:27Removing the Old Rear Sight
  11. 13:13Cleaning the Dovetail Slot
  12. 13:47Addressing Rust and Preparing for Bluing
  13. 14:22Applying Cold Bluing to the Dovetail
  14. 16:25Preparing the Dovetail Blank for Fitting
  15. 18:11Filing the Dovetail Blank for Fit
  16. 21:27Test Fitting and Final Adjustments
  17. 21:40Final Bluing and Oil Application on Blank
  18. 22:37Tapping the Dovetail Blank into Place
  19. 23:15Explanation of Dovetail Blank Fitting
  20. 24:55Final Inspection of Installed Sight
  21. 25:29Elevation and Windage Adjustments
  22. 25:47Limiting Post Feature
  23. 27:54Using the Peep Sight as a Ghost Ring
  24. 29:09Acknowledgements and Outro

Frequently Asked Questions

What tools are essential for installing a Lyman peep sight on a Marlin 336?

Essential tools include the Lyman peep sight, a Marble rear slot blank, appropriately sized screwdrivers for mounting screws and adjustments, a copper or German silver punch, a hammer, a fine file, Q-tips, cleaning solvents like alcohol or lighter fluid, and cold bluing solution.

How do you properly fit a dovetail blank for a Marlin 336 rear sight slot?

Fit the blank by filing material off its underside and sides until it can be tapped snugly into the dovetail slot, achieving about 75% insertion with finger pressure. Use a safe-edge file to avoid damaging surrounding metal.

What is the correct direction to tap out an old dovetail rear sight?

You should tap out the old dovetail rear sight in the same direction that the rifle ejects spent casings. This method helps prevent damage to the dovetail slot and the sight itself.

Why is it important to clean the receiver's threaded holes before installing a new sight?

Cleaning the threaded holes with Q-tips and solvent removes debris and old thread locker, ensuring the new mounting screws thread in smoothly and securely without cross-threading or stripping.

More Gunsmithing & DIY Videos You Might Like

More from GunBlue490

View all →