Here is a list of Frequently Asked Questions:

Tornado Technologies 7325 NE Imbrie Drive #181,
Hillsboro, OR 97124

Make sure to order and pay for your services on the website first.

We have recently moved!
Unfortunately, we were forced to move at very short notice due to our landlord’s refusal to renew our lease. Luckily, we were able to acquire our own premises and close on an expedited timeline. As many of you are aware, we had been at our Hillsboro location for near on 15 years. Evidently, over that time, we had acquired far more machines, equipment, and firearms parts than we were aware of. Regrettably we grossly under-estimated the time and manpower it would take to move our shop, and all associated machines and equipment. Combine this with supply issues on everything from paint to electrical wire to employees and Delays with moving our license, and it’s been slow going. Our transition to the new premises in nearly complete: We have finally received ATF approval for the new premises and are currently awaiting final approval from local government before recommencing business.

Step 1.

Add services to cart

Start by adding the desired services to your cart, making sure to carefully select all the appropriate options. Multiple items can be added and all their options will be displayed in your cart and on your order receipt.

Step 2.

Submit your order

Complete checkout like a regular online store. Orders must be submitted and paid for before shipping us any of your items for service. We accept all major credit cards.

Step 3.

Check for email

After ordering you will receive an email confirmation, detailing your order. There will be instructions on how and where to ship your items. Check your spam folder if you do not receive and email.

Step 4.

Ship your items

Ship your item(s) to us via your preferred carrier. Once received we will email a receipt acknowledgment. When the work is complete, the item(s) will be return shipped to you, and a completion acknowledgement and tracking number sent via email.
We are a Licensed Firearms Manufacturer, Exporter and Importer and hold an 07 and 08 FFL and are an 02 SOT (Special Occupional Tax) holder.
We are a Licensed Firearms Manufacturer, Exporter and Importer and hold an 07 and 08 FFL and are an 02 SOT (Special Occupational Tax) holder.
For NFA items (SBRs, SBSs, Machinguns, Destructive Devices, Silencers & AOWs), Oregon State law requires that we have proof of Federal registration. Please include a copy of the front of your ATF Form for our records. (Not required when sending a barrel only)
No, we do not make barrels. We offer service work on barrels, but do not make barrels at this time.
We extend and thread your existing factory barrel by adding either a permanent or removable extension. The type of which is chosen based on many years of testing. No welding is used as it would weaken the barrel. This extension has a clearance hole for passage of the bullet and has external threads for use with a suppressor. A thread protector is also provided.
See our guide on muzzle indexing threads
Possibly, please email us with what you have.
Yes, all threads are cut concentric to the bore for use with silencers/suppressors and muzzle brakes.
All threads are single point cut using a lathe.
We use a mix of CNC, NC and manual lathes.
Yes, we can cut metric and standard threads of any pitch and class where appropriate.
We do not need to remove the barrel from any of the bolt action rifles that we offer threading services on apart from some Accuracy International variants.
In most cases, no you do not. We can thread pistols like the Walther PPK, Beretta 21A and Škorpion VZ61 without removing the barrel. On some pistols like the H&K P7M8, we do need to remove the barrel, but this is included in the cost.
Yes. Firearms made or imported prior to 1968 are not required to have a serial number, nor are homemade firearms. We cannot work on firearms that have had the manufacturer’s serial number obliterated or removed.
Yes. As per Oregon State law, though, we will require proof of registration, such as a copy of the front of your ATF Form 1, 2, 3, 4 or 5. If the item being sent in is not a firearm, this is not required.
We accept Mastercard®, VISA®, Discover® and Amex®.
While it is physically possible, the import/export fees and freight fees make it impractical – so no.
From the “Checkout” page, click the link “Have a coupon? Enter your code” to enter the code.
Unfortunately, we do not offer threading on AK pattern rifles.
Left Hand (eg. – M16x1 LH means the threads are reversed from normal – Righty-Loosey, Lefty-Tighty.
Right Hand (eg. – M16x1RH means the threads work in the usual directions – Righty-Tighty, Lefty-Loosey. If LH or RH is not defined, – RH is assumed the default.
For Standard threads the Pitch is the distance in inches from one peak to the other. For Standard threads the Pitch is equal to 1/TPI. So, 20 TPI would have a pitch of 0.05”. For metric threads Pitch is the distance in millimeters from one peak to the other.
This is the nomenclature that refers to a thread that has a major diameter of 1/2 inch, is 28 TPI (Threads Per Inch) and is cut to the tolerance specs of 3A as per the graded series UNEF (Unified National Extra Fine) where the Nominal Major Diameter and Threads-per-inch (TPI) are defined by ANSI/ASME B1.1.
The “M” means that it is a metric thread with a major diameter of 13.5mm with a pitch of 1mm. The LH means it is a left-hand thread.