Free Shipping & Free Returns*

FREE SHIPPING on Over 250,000 Products

Shop now and get Free Value Shipping on most orders over $49 to the contiguous 48 states, DC, and to all U.S. Military APO/FPO/DPO addresses.

Enjoy our FREE RETURNS

We want to ensure that making a return is as easy and hassle-free as possible! If for any reason you are not satisfied with your purchase, simply return the item within 30 days of receipt, and we'll cover the cost of return shipping. Learn more about our Return Policy.

Shopping Cart
Heresy Design Silencer Timing Device
As Low As $8.95 Save Up to 10%
View Product
Compare (0)
Most Helpful Positive Review The best option for timing a muzzle device
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.
Show
Sort by
Filter by

Good execution

by Austen R, Verified Owner from TX, United States Written on 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. Genuinely wish I knew about these sooner because I would have saved minutes of my life
Pros:
  • Easy use
Cons:
  • definitely needs the instructions
Best Used for:
  • clocking muzzle devices
Would recommend: Yes
Was it helpful to you? Yes | No

timing device by Heresy Design

by James Prock, Verified Owner from OK, United States Written on July 19, 2026
Great product, worked and fit as described. Allowed me to time new suppressor properly!
Would recommend: Yes
Was it helpful to you? Yes | No

Good product

by Mike, Verified Owner from OK, United States Written on June 30, 2026
Used to mount a compensator to a PCC. Was very easy to install, locked up well and allowed an easy and proper index of the muzzle device. I will definitely use this again to mount other items that need to be specifically indexed to my firearms.
Pros:
  • easy to use
  • Great Fit
Cons:
  • A bit pricey compared to a normal crush washer
Best Used for:
  • Muzzle devices that need to be properly aligned
Would recommend: Yes
Was it helpful to you? Yes | No

Great idea, poor execution.

by Tex0311, Verified Owner from TX, United States Written on June 22, 2026
Timing is always a pain and these are supposed to make it easier. Unfortunately, the diameter of is too large which prevents you from getting a wrench on the muzzle device. Glad I only bought 2 sets...
Would recommend: No
0 of 2 found the following review helpful.
Was it helpful to you? Yes | No

Great as usual

by M, Verified Owner from UT, United States Written on May 24, 2026
I've received a few of these with B&T muzzle devices. I ended up picking up the larger size to install an older AK warcomp. It worked perfectly. These will end up on any future build of mine for sure.
Would recommend: Yes
Was it helpful to you? Yes | No

Simple and effective

by Jay, Verified Owner from OR, United States Written on May 24, 2026
This S.T.D is quick to install, reusable unlike a standard crush washer and it dirt cheap. You really can’t go wrong with these guys
Would recommend: Yes
Was it helpful to you? Yes | No

Quality Products

by John K., Verified Owner from NY, United States Written on 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.
Would recommend: Yes
1 of 1 found the following review helpful.
Was it helpful to you? Yes | No

Muzzle device timing shims

by Rick, Verified Owner from TX, United States Written on 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.
Pros:
  • Ease of use
Cons:
  • None
Best Used for:
  • Various muzzle devices
Would recommend: Yes
1 of 1 found the following review helpful.
Was it helpful to you? Yes | No

Muzzle device timing shims

by Rick, Verified Owner from TX, United States Written on 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.
Would recommend: Yes
1 of 1 found the following review helpful.
Was it helpful to you? Yes | No

indexing spaces for suppressor locating and retention

by Rick, Verified Owner from TX, United States Written on April 3, 2026
Worked as advertised, used on AR15 7.62x39 to properly index a SilencerCo Hybrid suppressor.
Secure and solid
Pros:
  • Ease of use
Cons:
  • None especially at price point
Would recommend: Yes
1 of 1 found the following review helpful.
Was it helpful to you? Yes | No
There are no reviews that match your criteria. Would you like to review this product?
Last updated 2026-03-19 UTC.