Proud to be on the Frontline on the war on terror!

Additional Images

ADA Brace Solution / MFI 9" Barrel Extension / with 1/2 X 36 TPI threads. For Older / 1st Model CMMG Mk9 PCC 9mm pistol 8” barrel. / Large 0.692" I.D. / Includes S&H for 1st Class Mail / 922r Compliant Part / Custom Non-Returnable / NOT RDB or Banshee

Designed specifically to fit the AR15 Pistols to extend from 8.50" barrel to BATF 16" Legal Length.


Limited Supply: only 1 remaining
Was: $165.00
Sale: $85.00
Save: 48%
Save: $80.00

Customize Your Item

- USPS Priority Upgrade / 1st In L -
- No Export / US DOS or US DOC -
 * required
SHIPPING IS INCLUDED VIA USPS on orders over $82.00 Dollars AND OR If S&H is INCLUDED in the Title / Discription.


MFI 9" Barrel Extension / with 1/2 X 36 TPI threads. For Older Colt Magazine Pattern / 1st Model PCC CMMG Mk9 Direct Blow Back in 9mm cal. pistol with an 8” barrel. / Large 0.692" I.D. / Price includes S&H for 1st Class Mail. 922r Compliant Part. / Custom Non-Returnable / NOT Later Models with Delayed Blow Back RDB or Banshee / Super Light Weight.

Price INCLUDES USPS 1st Class Mail & Insurance.

If you want FASTER SHIPPING click the "Expedited Shipping" Tab and choose the Priority Mail Upgrade for just $5.75 more.

Also available in other thread patterns (Call or email for details: 760-728-7079 or

This page is ONLY for the ADAPTER / BARREL EXTENSION seen in the 1st photo above.

You may also order (at an additional cost) the M4 or SOCOM Fake Silencer / Barrel Shrouds seen in the above photos that slides over and hides part or all of the extension.

NOTE: This is a CUSTOM Barrel Extension, meaning I am taking an existing barrel extension and I am MODIFING it by boring out the rear area and adding new threads. This modification makes the extension fit a specific thread pattern and direction, making it thus NON-RETURNABLE for any reason. Be sure you order the correct thread pattern the first time.

This adapter / barrel extension is weapons grade steel. The length is 229mm / 9.015 inches, which if permanently attached will give you about 16.25" of barrel (assuming you have a 7.75" barrel). This added length will give you the much-needed barrel length to make a 100% BATF legal rifle. It also qualifies as a 922r Compliant part.

NOTE: Even though the overall length of this adapter is 9.015" part of that is the threads. As you can only count the threaded area once (threads in the adapter overlap the threads on the barrel) the total ADDED LENGTH to any weapons system's barrel would be about 8.50". For example, a 7" barrel with this adapter will end up being only 15.375" long, so too short for BATF 16" legal length. The final length you end up with also depends on how long your threads are. So, when measuring, you measure from the shoulder where the threads bottom out on the barrel backwards to the bolt face. Do not count any threads on the barrel. Then subtract that number from 16" and that is your minimum length or extension required.

So now you can turn your HK UMP parts set or your Omega Shadow Pistol into a legal semi rifle. The internal hole diameter that the bullet passes through is 0.692" in diameter. We made this large enough to keep the escaping gases from affecting the bullet trajectory. The larger hole size also helps keep the weight down. In the end this is much lighter than a long 16' barrel version. The weight of the product is only 5.8oz!


  • 100% Made in the USA!
  • The made of Weapons Grade Steel.
  • Heat Treated to about Rockwell 27.
  • Precision CNC machined from billet.
  • Threaded 1/2 X 36 TPI Right Hand to a depth of 0.750"
  • Maximum Length: = 229mm or 9.015 inches.
  • Maximum Barrel Extension: = 215.9mm or 8.50 inches.
  • Maximum I.D. @ 0.692"
  • Maximum O.D. @ 0.800"
  • Weight: 5.8 ounces!
  • Mil. Spec. Black Oxide to give the unit a semi matt finish without any oil on it, otherwise it looks semi-gloss. The Photo has been lightened to show detail and profile.
  • Can be Custom Trimmed / Shortened

The MFI Barrel Extensions / Adapters can easily be Blind Pinned & Welded to BATF specifications / regulations via regular MIG welding to comply with "permanently attached" guidelines.

The MFI M4 Style Fake Silencers / Barrel Shrouds / Barrel Extensions / Adapters do NOT reduce muzzle noise or muzzle flash in any way. So, these are 100% legal for the regular civilian to own in all 50 US States.

We deliberately made this adapter / barrel extension out of steel so it can easily be to meet BATF permanently attached criteria via MIG or TIG welding. Aluminum extensions are a bad idea as the heat exchange from firing will erode the inside of the aluminum extension very quickly, whereas steel lasts almost forever. All NFA & BATF Rules apply.

Fake Silencers are also known as: Dummy Can, Faux Suppressor, Mock Silencer, Barrel Shroud & Non-Functional Sound Suppressor.

No FFL needed, No Special License, No Permit Required & No Special Tax Stamp needed to order.

MFI 9 Inch Long Barrel Extension COMES WITH:

  • 1 - Adapter / Barrel Extension ONLY


In accordance with the Joe Biden & Beto O’Rourke directive I personally as well my company no longer own(s) or possess any firearms or ammunition. This includes but is not limited to: Handguns, Pistols, Shotguns, Rifles, NFA items, Hog Legs, Fire Sticks, Smoke Poles and or Thunder Clubs.

All firearms that appear on our web site, regardless of what is written about them, are not owned by the company nor possessed by anyone associated with MFI and may even be CGI / PhotoShop.

Therefore regardless of any new firearms laws / taxes, no probable cause can EVER be assumed on any property (stationary or mobile) owed by myself or MFI.

AGAIN: We are 100% in compliance with any possible new “Biden / O’Rourke Public Safety Act” and therefore NO PROBABLE CAUSE could ever be assumed.

Lastly anyone arriving with a warrant of any kind will be assumed to be an IMPOSTER with intent on murdering us and will be treated as such without warning.

Those invading our territory may receive serious and even fatal wounds from rusty blades, clubs with bent nails, spear tips, arrows and or crossbow bolts.


This item is NOT RESTRICTED FOR DOMESTIC US SALES in any way and we offer DOMESTIC USA shipping to ANYONE. We ship to all 50 US States as well as all US Territories i.e. Guam & Puerto Rico. Sorry we can NOT ship to ANY APO address regardless of actual location.

This item is 100% RESTRICTED FOR EXPORT OUTSIDE THE USA. The US Department of State regulates / restricts this product and it is NOT EXPORTABLE outside the USA even to LE, Governments or Military without State Department approval.

This approval is AVAILABLE through MFI as we are an ITAR / Dept. of State Registrant with the Directorate of Defense and Trade Controls Office. We can obtain a US State Dept. Export License for you.

Please feel free to contact us if you have any questions on this issue.


  • BE-9-.250-HOLE
  • BE-9-.250-HOLE
  • MFI
  • Available
  • New


Shipping Information

  • Item Requires Shipping
  • 0.4 lbs.
  • SHIPPING IS INCLUDED VIA USPS on orders over $82.00 Dollars AND OR If S&H is INCLUDED in the Title / Discription.

Customer Reviews

Comment Total Reviews (0)

Write the First Review!

You must login to post a review.

Share ADA Brace Solution / MFI 9" Barrel Extension / with 1/2 X 36 TPI threads. For Older / 1st Model CMMG Mk9 PCC 9mm pistol 8” barrel. / Large 0.692" I.D. / Includes S&H for 1st Class Mail / 922r Compliant Part / Custom Non-Returnable / NOT RDB or Banshee on Facebook

Items: 0
Total: $0.00

Why Shop From MFIAP?

Fast Shipping

SHIPPING IS INCLUDED on all orders over $82.00 See our detailed shipping rates. 60 Day Money Back on Returns. View our policies and procedures.

Superior Customer Service

Find the answers to commonly asked questions.

Secure Web Transactions

All transactions involving personal information are secured through SSL encryption.