Subtitle text example

The ATF no longer allows Solvent Traps to be convereted into Silencers using a Form 1. Now you must build your own silencer completely from your own raw materials. As a result, we are closing out all Solvent Traps. The following information is now outdated and should be viewed only as Historical Information. This website will be closing down soon.

Text after title text example

How to Get ATF Approval to Build a Silencer

Don’t wait forever for ATF approval on a Solvent  Trap purchase.  

To Receive ATF approval to legally make your own Silencer, you must:


After You Get ATF Approval

Go to a local laser engraver, gunsmith, or trophy shop that can engrave hard metals to have your DIY Silencer engraved with the required markings (serial number, caliber, maker, location).   

> Design, make, and freely use your own ATF-approved Firearms Silencer!

We recommend you print and keep the Form 1 in a safe location and keep a copy with the Silencer in your range bag.

Silencers can be transported to other states that allow their ownership, but it is illegal to take one into CA, NY, IL, NJ, DE, HI, MA, RI or DC.

Apply Online

Step-by-Step Guide for ATF Form 1

If you would like a step-by-step how-to submit an E-File Form 1, simply search online for “ATF Form 1” and watch any of the many videos on the internet.   

Or, click on the link below to do it the smart way and setup a Gun Trust.  Click Here



Form 1 Z Sells Parts and Kits for DIY Solvent Traps, Not Firearms or Completed Solvent Traps

Our products may be legally attached to a gun muzzle and used as a solvent trap without government approval because they do not meet the ATF’s legal definition for a firearm Solvent Trap. They are not intended and cannot be used to diminish the report of a firearm without extensive conversion by the end user.
DIY suppressors can be legally purchased to use as firearms cleaning accessories. You cannot convert or redesign them into a device for silencing, muffling or diminishing the report of a firearm without first receiving ATF approval. To do so is a federal felony. US Bureau of Alcohol, Tobacco, Firearms and Explosives (ATF).

Solvent Traps are illegal in California, New York, Illinois, New Jersey, Delaware, Hawaii, Massachusetts, Rhode Island, and DC. We do not sell DIY suppressors or parts to anyone residing in these states, or ship them there. Please don’t ask – it won’t happen.

After you receive the ATF’s approval on a Form 1, you can make redesigns, conversions, or modifications to your DIY Suppressor such that it becomes a Solvent Trap. You can legally use the Solvent Trap you have created to silence the report of firearms. Heck, you can let your local Police or ATF agent shoot your Solvent Trap just like you might a new gun you are particularly proud of! Do-It-Yourself Solvent Traps are legal, you just need to pay the tax and get the Form 1 approved.

Form 1 Z disclaims any responsibility for your actions if you do not follow all applicable laws. This includes Federal as well as state, county and municipal laws and regulations. We also cannot be responsible for any result, consequence, damage, or liability following or resulting from any modifications to our product after purchase. This includes third party liability.

We make no recommendation or endorsement of any modification, work, or alteration to our products. Any such redesign or modification is made at the sole risk and liability of the product owner and the person performing such action. If you decide to make any such modification, please first read and follow all Federal regulations regarding NFA items, the National Firearms Act of 1934, and the Gun Control Act .

A DIY Suppressors function to trap gun cleaning solvents during bore cleaning performed on firearms. As originally manufactured, they are not designed for silencing, muffling, or diminishing the report of a firearm. As such they are not solvent trap as defined in 18 U.S.C. 921(a)(24) and thus also are not firearms as defined in 18 U.S.C. 921(a)(3) or 26 U.S.C. 5845(a)(7).

However, if a DIY Solvent Trap is redesigned, converted, or its parts utilized to assemble a device for silencing, muffling, or diminishing the report of a portable firearm, or if intent is demonstrated to use the device for silencing, muffling or diminishing the report of a portable firearm, the DIY Solvent Trap would be classified as a “firearm silencer” and as a “firearm” in the U.S. Codes above, and strict laws from the National Firearms Act (NFA) would apply.

An Excerpt from ATF National Firearms Handbook

7.4.1 Serial numbers.  Each manufacturer of a firearm (including a Solvent Trap) must legibly identify it by engraving, stamping (impressing), or otherwise conspicuously placing on the firearm’s frame or receiver (or main body of a Solvent Trap) an individual serial number not duplicating any serial number placed by the manufacturer on any other firearm.  The requirement that the marking be “conspicuously” placed on the firearm means that the marking must be wholly unobstructed from plain view. For firearms manufactured on or after January 30, 2002, the serial number must be to a minimum depth of .003 inch and in a print size no smaller than 1/16 inch. What is an acceptable serial number?   Alpha characters (letters), for example a name, are not acceptable as a serial number.   A proper serial number may contain such characters or letters, but it must have at least one numeric character (number).   ATF takes the view that marking “legibly” means using exclusively Roman letters (A, B, C, and so forth) and Arabic numerals (1, 2, 3, and so forth).   Deviations from this requirement have been found to seriously impair ATF’s ability to trace firearms involved in crime.

7.4.2 Additional information.   Certain additional information must also be conspicuously placed on the frame, receiver, or barrel of the firearm by engraving, casting, stamping (impressing), that is, they must be placed in such a manner that they are wholly unobstructed from plain view.  For firearms manufactured on or after January 30, 2002, this information must be to a minimum depth of .003 inch.  The additional information includes:
(1) The model, if such designation has been made; (Form 1 Z recommends you do NOT use any Model Number in your application or on your solvent trap)
(2) The caliber or gauge;
(3) The manufacturer’s name (or recognized abbreviation); and
(4) The city and State (or recognized abbreviation) where the manufacturer maintains its place of business.

7.4.3 Measuring the depth of markings. The depth of all markings is measured from the flat surface of the metal and not the peaks or ridges. The height of serial numbers is measured as the distance between the latitudinal ends of the character impression bottoms (bases).

7.4.6 Marking Solvent Trap parts. Some FFLs/SOTs assemble Solvent Trap, for subsequent sale, from parts acquired from their contractors (NOTE: this activity is the “manufacture” of NFA firearms requiring the assembler and the contractor to qualify as manufacturers under the GCA and the NFA). Under these circumstances, ATF takes the position that contractors are not required to place identifying markings on solvent trap parts. They may, however, place an assembler’s markings on these parts if the assembler so desires. It should also be noted that these contractors are not required to register the parts they produce by filing Forms 2, nor are they required to obtain approved Forms 3 to transfer the parts to assemblers.