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MFI HK Style G28 Muzzle Brake CA DOJ AOL 30" for Steyr AUG / Microtech MSAR (13mm X 1.0 Pitch) (16" Barrel)

Designed specifically to fit the Steyr AUG & Clones to Make a Legal 30" OAL.


Not Available
Availability: REPLACED WITH NEWER VERSION (See below)
Pricing: $95.00


MFI HK Style G28 Muzzle Brake CA DOJ AOL 30" for Steyr AUG / Microtech MSAR (13mm X 1.0 Pitch)

This Version of the MFI HK G28 Flash Suppressor Muzzle Brake is specifically made for the California Market to meet the California DOJ minimum overall length of 30" for the New Steyr AUG/A3 SA USA by Steyr Arms & the Microtech MSAR AUG.

NOTE THREADS FOR AUG: There are 2 known thread patterns for the Original & New AUGs. We make these in BOTH threads and they have different web pages. You will need to double check your weapon to be sure that you order the correct thread. It is generally easy to tell as one is Right Hand and the other is Left Hand threaded. Original Steyr AUGs and most clones that use the original AUG magazine (not an AR15 mag) will be 13mm X 1.0 Pitch Left Hand. The AUG clones utilizing an AR 15 magazine can be either the 13mm or 1/2 X 28 Right Hand.

So if your flash suppressor on your AUG comes off in a regular right hand direction & it will take a standard .223 caliber AR15 flash suppressor it is a 1/2 X 28 thread. If the flash suppressor comes off OPPOSITE the normal twist i.e. Left Hand then it is likely the 13mm.

NOTE CUSTOM THREAD: This same item will fit any number of different weapons platforms and threads via our custom thread program. Just contact us with the thread you have or application and we can re-tap one for you for only $25.00 extra.

Unlike our other products this item is specifically for a VERY LIMITED MARKET and as such is made in very small volumes. Normal production for any other item is 1000 per year minimum. This California Legal version we have only made 50 units to test the market. So it goes without saying we have to charge more money for these. We do our best to keep the price down for our valued CA customers. Support the USA and "Buy American" and support all the California based firearms companies and "Buy from a California Dealer or Manufacturer."

  • 100% Made in the USA!
  • Designed for LIVE FIRE.
  • The made of Weapons Grade Steel.
  • Precision CNC machined from billet.
  • Threaded 13mm X 1.0 Pitch Left Hand
  • Maximum Length: = 120.75mm or 4.750 inches.
  • Maximum Barrel Extension: = 107.75mm or 4.250 inches.
  • Maximum I.D. @ 0.465"
  • Weight: 4.7 ounces!
  • Mil. Spec. Black Oxide to give the unit a semi matt finish.

NOTE: Even though the overall length of this item is 4.75" part of that is the threads. As you can only count the threaded area once (threads in the adapter cover the threads on the barrel) the total ADDED LENGTH to any weapons system's barrel would be about 4.25".

This item fits any weapon with a 13mm X 1.0 Pitch Left Hand threads WITHOUT ANY MODIFICATION. You do however need to remove the existing Flash Suppressor

This accessory does NOT affect the accuracy of the weapon in any way.

Muzzle Brakes are also known as: Flash Suppressor, Flash Hider, Flash Hinder & Anti Climb Device.

These are designed for LIVE FIRING.

We test all our Muzzle Brakes / Flash Suppressors to be 100% sure that they function shot after shot without any problems.

MFI uses the term "Flash Suppressor" ONLY in reference to the shape / look that our Muzzle Brakes have as they are designed to mimic the external appearance of their Military Counterparts. The fact is that all our Muzzle Brakes have ZERO Flash Suppression and little if any Anti-Climb effects during shooting. This is because we bore out the forward section with a straight through hole to allow the customer to adjust / fine tone the exact Overall Length of the weapon to achieve the best looking and 100% legal result.

The MFI Barrel Extension / Muzzle Brake does 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.

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


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.


  • FS-G28-13MM-LH-LONG
  • FS-G28-13MM-LH-LONG
  • MFI
  • New

Shipping Information

  • Item Requires Shipping
  • 0.3 lbs.
  • $0.65

Customer Reviews

Comment Total Reviews (2)

Thank God for MFI!!!!!! AAA+++
  • Currently 5/5 Stars

Reviewed by: Al03/08/2013 03:29PM

Product ownership: Less than 3 months

Purchased from: MFIAP.COM

I so needed to get this part to make my gun legal in the state that I live. Not only did it fit plug and play, but looks GREAT!!!!!


I called 6 weeks ago...
  • Currently 5/5 Stars

Reviewed by: Ken03/08/2013 03:36PM

Product ownership: Less than 3 months

Purchased from: MFIAP.COM

I called MFI 6 weeks ago about a solution to my AUG probelm... in CA we need to have a minimum 30" OAL. I spoke to someone on the phone and we talked for 30 minutes about what I needed... The conversation ended with the guy telling me that maybe they would do something... then 10 days later the same guy calls me and asks me if I want to T&E the prototype??? WOW!!!

No one I know of does this sort of thing... then to finish it all off he sends me an adapter the right length to make me legal in the mean time while the product in volume... then 4 weeks later I have the excat part I asked for!!! Again WOW...

We so appreciate a company like MFI who looks out for the customer and really listens and then PREFORMS with lighting speed!!!


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