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Williams™ Aperture Twilight WGRS 3/8" Diameter with .093 Hole Long Shank - 1437

100 2 100 0

Quick Overview

Williams™ Twililight Regular 3/8" 1437 is designed to fit standard thread size and will accommodate Williams, Redfield and Lyman receiver sights.

Availability: In stock



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

Williams™ Aperture Twilight 3/8" 1437 are designed to be used on Williams™ Redfield and Lyman receiver sights. The Williams™ Aperture Twilight 3/8" 1437 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. This little copper ring ... review by John on 6/27/2017

    This little copper ring works. It makes the sight easier to line up with the front blade on my contender. I find the .093 a little too big. I bought a .050 and drilled it out to .075 and this is perfect for my eye.

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

    Been looking for apertures for my O3-A3 redfield sight for years. Perfect fit and finish. Great price, fast shipping.

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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 -