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Williams™ Aperture Twilight 3/8" Diameter with .050 Hole - 1435

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Quick Overview

Williams™ Twililight Regular 3/8" 1435 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 .050 Hole 

Williams™ Aperture Twilight 3/8" 1435 are designed to be used on Williams™ Redfield and Lyman receiver sights. The Williams™ Aperture Twilight 3/8" 1435 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. Get this! review by The Bear on 6/27/2017

    Purchased the Williams Ace In the Hole Sight Set for a 10/22. Based on customer reviews - I also purchased this additional aperture. It\'s smaller than the one supplied with the sight. I find I use this one all of the time and the larger one goes unused. This aperture is just about perfect and very accurate. Glad I have it. Highly recommend!

  2. Excellent purchase. review by Buford on 6/27/2017

    Been looking for apertures for years for my Remington 03-A3 with Redfield peep sights. These were a perfect fit. Very good quality.

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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. 


Standard Ground FREE over $50 4-7 Business Days
Three-Day Variable Cost 3 Business Days
Two-Day Variable Cost 2 Business Days
Overnight Variable Cost 1 Business Day

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Priority Mail Variable Cost 2-3 Business Days


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 -