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Williams™ Aperture Twilight 3/8" Diameter with .093 Hole - 1436

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Quick Overview

Williams™ Twililight Regular 3/8" 1436 is designed to fit standard thread size and will accommodate Williams, Redfield and Lyman receiver sights.

Availability: Backorderable



Williams™ Aperture Twilight 3/8" Diameter with .093 Hole 

Williams™ Aperture Twilight 3/8" 1436 are designed to be used on Williams™ Redfield and Lyman receiver sights. The Williams™ Aperture Twilight 3/8" 1436 creates a sharp contrast that gives quick definition to the aperture. It is important to note the following when choosing the correct Aperture for your sight:


  • The fractional dimension is the outside diameter of the metal aperture.
  • The decimal dimension is the size of the hole drilled in the aperture used to aim.
  • Twilight apertures are specifically designed for low light situations. 
  1. Typical Williams ... review by Jason on 6/27/2017

    Typical Williams quality-very well made and built to last. The insert appears to be a bit of brass tubing press fit into the sight. You probably would not want this for target shooting as the brass could catch sunlight and distract your eye but for low light conditions or in the woods it works great. If you like hunting with a peep sight instead of a scope you need this.

  2. Great Sight review by Brow on 6/27/2017

    I use this sight on my T/c Encore and absolutly love it for hunting. Helps bring in the light much better then the standard black. Easy to install and use. Just make sure you lock tight it durring instalation.

  3. Williams Aperture Twilight 3/8 review by Cea on 6/27/2017

    I have several of these apertures in different sizes for my rimfire, centerfire and air rifles. For my aging eyes, these sights make shooting very good groups possible.

  4. Help for old eyes review by Hudson Valley Frank on 6/27/2017

    This aperture works extremely well in low light conditions. For my eyes it makes all of the difference.

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Most items ship within 1 business day. We ship orders from our warehouse Monday through Friday. If an in-stock order is placed on Friday evening, Saturday or Sunday, it may not ship out until the following Monday. We rush-ship directly to customer's doors throughout the United States. Depending on the shipping method and area of the country, orders can arrive between 1 and 7 business days. 


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If you are not 100% satisfied with your order, you can return it to us for a refund or exchange within 30 days of delivery. We accept returns on all products that have not been used or registered, no questions asked. All returns are subject to a 5% Re-Stocking Fee. To make returning an item easy, contact our friendly customer service representatives toll free 1-855-297-7000.

warning-iconWARNING: This product can expose you to Lead, which is known to the State of California to cause cancer and birth defects or other reproductive harm. For more information go to -