***Attach Copy of Form 4 With All Suppressor Returns***

Please complete the online form below or print the PDF form and include with your suppressor along with a copy of your Form 4 when returning for general service or suppressor repair. There will be a $30.00 return shipping fee to ensure proper delivery and signature.

General Service Form (PDF)

Form 4

Suppressor Repair/Service Form

Name*
First Last
Email*
Pick One*
- Online Form
- Upload PDF (Found at Top)
Upload Form 4*
Max. file size: 50 MB.
Online Form
Date*
MM slash DD slash YYYY
Address*
Street Address Address Line 2 City State ZIP Code
Phone*
Choose One:*
- Repair Suppressor
- Other
Make*
Model*
Serial #*
Description*
Ship To:
Mack Brothers
ATTN: Service/Repair
3560 Mayer Avenue
Sturgis, SD 57785
In accordance with Chapter 44 of Title 18, US Code, and Chapter 53 of Title 25, US Code, I am temporarily conveying to you the enclosed NFA firearm(s) for repair. The BATFE does not consider such a temporary conveyance for the repair of NFA firearm a “transfer” under the terms of the NFA. Therefore, a Form 5 transfer application is not required. In order to properly document the repair of this firearm and ensure a transfer does not take place, I have included a copy of the current registration of the item (a copy of the BATFE Form 3, 4, or 5 is attached) and this letter authorizing Mack Brothers to make the necessary repair to these firearms and return them to me when completed.
Signature*
*By filling out your full name you are recognizing this form is signed and you understand the above conditions.
Note: If customer sending in the NFA item is an FFL holder, be certain to also record in bound books the disposition of the firearm is required by Part 179, Title 27, Code of Federal Regulations to reflect the temporary location of this firearm for repair purposes. Sign out to Mack Bros, STURGIS, SD (3-46-00551) with note of “repair” and sign it back in when received.
*Attach Copy of Form 4 with all suppressor returns or your suppressor cannot be worked on*

Suppressor Repair and Service Form

Form 4

Online Form

Ship To: