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Customer Reviews
Helpful Positive Review
Quality Products by John K., Verified Owner, May 23, 2026
I’ve been dealing with OpticsPlanet for many years now and have always been satisfied with the quality. From the simple things like a washer to a trigger or muzzle, their products are well manufactured as they should be. Keep up the good work. John K...
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1/1 found this helpful
Helpful Positive Review
Let me start by saying, I hate shims so much. These fix everything wrong with shims. No measuring, just stack them up and torque them to 25 ft lbs. Done. Time whatever you want. Love these things. I have them on 10 different setups now.
3/3 found this helpful
Helpful Positive Review
Muzzle device timing shims by Rick, Verified Owner, April 18, 2026
This item is very good for direct thread suppressor retention. It allows for a sold, secure attachment of suppressor on direct thread mounts. Heat or recoil does not affect the tension, without worry of loosening during heavy use.
1/1 found this helpful
Helpful Positive Review
Muzzle device timing shims by Rick, Verified Owner, April 18, 2026
These are just the ticket for properly locating and retaining various muzzle devices. Unaffected by recoil or temperature. Well made, tempered and concentric.
1/1 found this helpful
Helpful Positive Review
Worked as advertised, used on AR15 7.62x39 to properly index a SilencerCo Hybrid suppressor. Secure and solid
1/1 found this helpful
Most Recent Reviews
Good execution by Austen R, Verified Owner, August 4, 2026
I didn’t really understand how they would work when I first bought them over traditional shims. They have a ridiculously easy to follow instruction guide, and on top of that there was no guess work if you’ve shimmed for the correct clocking. Genuinel...
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made-in-usa-flag Made in USA

Help support American manufacturing! Marked models of this product have gone through rigorous review and been certified by the manufacturer as Made in the USA.

Product Info for Heresy Design Silencer Timing Device

The patent pending Heresy Design Silencer Timing Device (STD) was designed for timing muzzle devices or silencer mounts. It can also be used to retain direct thread silencers. Unlike traditional 6-10 piece shim sets, the STD simplifies the process with 3 washers, and can be installed in under 60-seconds.image

Specifications for Heresy Design Silencer Timing Device:

Manufacturer: Heresy Design
Color: Black
Country of Origin: USA

Features of Heresy Design Silencer Timing Device

  • Precise Alignment: Designed to produce 25 ft. lb., once the alignment point is reached, no additional torquing is required.
  • Easy Installation: No specialized tools or advanced knowledge required.
  • Insurance for Your Investment: Reduces the risk of damage to your suppressor.

Package Contents:

  • Heresy Design Silencer Timing Device

Heresy Design Silencer Timing Device Orderable Models

List of Orderable Models

  • Heresy Design Silencer Timing Device, 1/2in Threads, Black, HSTDA , MPN: HSTDA , UPC: 850055721166 , Code: 6KH-FSH-ERT-HSTDA
  • Heresy Design Silencer Timing Device - 5/8in Threads, Black, HSTDB , MPN: HSTDB , UPC: 850055721180 , Code: 6KH-FSH-ERT-HSTDB
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Last updated 2026-09-01 UTC.