How to Install a Three-Position Safety on a Remington 700 | MidwayUSA Gunsmithing

Published on September 11, 2013
Duration: 6:02

This video details the advanced process of installing a Gentry three-position safety on a Remington 700 bolt. It covers bolt disassembly, precise milling of the bolt body and cocking piece, and reassembly. The tutorial also demonstrates filling the factory safety cutout with TIG welding for a cleaner aesthetic.

Quick Summary

A three-position safety blocks the firing pin directly, offering three settings: rear (bolt locked, safe), middle (bolt open, safe), and forward (fire). Installation requires precise milling of the bolt body (0.100" deep recess), cocking piece (40-degree relief), and firing pin (0.055" clearance).

Chapters

  1. 00:00Introduction to 3-Position Safety
  2. 00:37Remington 700 Bolt Disassembly
  3. 01:09Trigger and Shroud Modification
  4. 02:22Milling the Bolt Body
  5. 03:26Cocking Piece & Firing Pin Mods
  6. 04:56Reassembly & Receiver Finishing

Frequently Asked Questions

What is a three-position safety and how does it differ from a traditional safety?

A three-position safety, like the Gentry model, blocks the firing pin directly and offers three settings: rear (bolt locked, safe), middle (bolt open, safe), and forward (fire). Traditional safeties often only block the trigger mechanism.

What are the key machining steps for installing a Gentry safety on a Remington 700?

Installation requires milling a 0.100-inch deep recess in the bolt body for locking, a 40-degree relief cut on the cocking piece, and a 0.055-inch deep cut on the firing pin for clearance.

Can the factory safety cutout on a Remington 700 receiver be removed?

Yes, the factory safety cutout on the receiver tang can be filled using TIG welding. The area is then filed smooth, polished, and re-blued to match the receiver for a custom appearance.

What tools are essential for modifying a Remington 700 bolt for a three-position safety?

Essential tools include a vise, bolt disassembly tool, a milling machine with a 1/8-inch carbide end mill, a transfer punch, and potentially a TIG welder for receiver finishing.

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