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Factory Second / Damage / 3.875" Long Lug MFI HK G28 DMR Style Muzzle Brake / Barrel Extension for Ca. Compliant: AUG, IWI TAVOR with 18" Barrel or any weapon with 1/2 X 28 thread to get to Ca OAL 30" or MD OAL 29". WARNING: Use only with .22 LR, .223 / 5

Designed specifically to fit the any weapon with this specific thread pattern to simulate the look of the HK / Heckler & Koch G28 Style Weapons Platform / HK DMR.


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FACTORY SECOND / DAMAGE / BLEMISH / COSMETIC ONLY: The defects are in the finish where the item was damaged / dented during shipping to the plater and were plated anyway. See first close up photo above. All nicks are on the leading edge of the slots. This example is average, but nicks can be dents as well and look perhaps worse, but are still very small and hard to see past 2 feet away. Greatly discounted and no returns or exchanges for this reason.

HAND SELECT NOTE: I have a very few that are hardly noticeable, but still not 100% to my standards. If you choose the "Hand Select" option for an added $10.00 you will get the best possible one available. I have personally inspected and marked these as 90% or better. Anything below that marking of 90% does not qualify for this up charge. Once I am out of the 90% or better this option will disappear. Really a great deal for hand select.

3.875" Long Lug MFI HK G28 DMR Style Muzzle Brake / Barrel Extension for Ca. Compliant: Steyr AUG, MSAR or IWI TAVOR with 18" Barrel or any weapon with 1/2 X 28 thread to get to Ca OAL 30" or MD OAL 29" or a Featureless Ca. Semiautomatic Rifle.

WARNING: The Exit Hole necks down to 0.265". Use only with .22 LR, .223 / 5.56 or 5.45 bullets.

California Department of Justice's is deliberately ambiguous on all its definitions. This requires us to read carefully their requirements and comply as best as we can. After reading all the available regulations and definitions we have come to the conclusion that our NEW G28 Muzzle Brakes when installed correctly will comply with the current CA DOJ regulations and definitions as "Muzzle Brakes" and NOT "Flash Suppressors” as our "Muzzle Brakes" operate as follows:

  • This particular MFI G28 Muzzle Brake does NOT reduce the amount of flash discharged from the firearm.
  • This particular MFI G28 Muzzle Brake does NOT redirect the flash discharged from the firearm away from the field of view of the shooter.
  • This particular MFI G28 Muzzle Brake DOES IN FACT REDIRECT the flash that normally would be discharged downward from firearm's muzzle UPWARDS INTO THE SHOOTER'S FIELD OF VISION as there are no slots / holes / openings at the bottom of this product, like those normally found on a flash suppressor.
  • This particular MFI G28 Muzzle Brake DOES IN FACT REDIRECT the flash that normally would be discharged forward from firearm's muzzle UPWARDS INTO THE SHOOTER'S FIELD OF VISION as there is a neck down in diameter of the exit hole which forces the flash / gases backward and out the slots in the top of the product.
  • This particular MFI G28 Muzzle Brake is SOLELY MARKETED as a "Muzzle Brake" which provides anti-recoil and downward thrust / anti muzzle climb due to its physical characteristics.
  • This particular MFI G28 Muzzle Brake also conforms with the definition of a "Muzzle Brake" according to the CALGUNS flow chart.

Do not take our word for it... Read the Regs yourself... This is the closest thing we can find on current regulations.

Page #4 ® covers the definition of a "Flash Suppressor".

Page #4 (x) covers Overall Length, how it is measured and alludes to the Muzzle Brake needing to be permanently attached.

Know Your Rights. Stand Your Ground. Never Surrender!

We have added "Simulated Lugs" the type found on the new HK DMR G28 rifles and seen at SHOT SHOW 2016 in the HK Booth. I say "Simulated" as we only made an exact copy for the 15mm short 3.875 version. The real / correct Lugs have 2 that are the same and one that is taller. I felt this was a distraction and choose to make the 3 lugs 100% symmetrical. The primary reason being cosmetic, but as no one at HK could tell us what device these lugs mated with, it appeared to also be pointless.

This Version of the MFI HK G28 Muzzle Brake is specifically made for the California and Maryland Markets to meet the California DOJ & MD minimum overall length of 30" or 29" for the New Steyr AUG/A3 SA USA by Steyr Arms, the Microtech MSAR AUG & the IWI TAVOR X95.

This item will fit ANY BARREL with a 1/2 X 28 Thread.

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 muzzle device 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.

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. 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."

  • Simulated Lugs the type found on the new HK DMR G28 rifles.
  • 100% Made in the USA!
  • The made of Weapons Grade Steel.
  • Heat Treated to about Rockwell 30.
  • Precision CNC machined from billet.
  • Threaded 1/2 X 28 tpi Right Hand
  • Maximum Length: = 98.6mm or 3.875 inches.
  • Maximum Barrel Extension: = 83.6mm or 3.350 inches.
  • Maximum I.D. @ 0.465"
  • Weight: 5.2 ounces!
  • 3 - Exhaust Slots venting upward only.
  • Anti-Recoil Attributes
  • Anti-Climb Attributes
  • Mil. Spec. Deep, Deep Gray (near black) Phosphate Parkerized to give the unit a semi matt finish. The Photo has been lightened to show detail and profile.

NOTE: Even though the overall length of this item is 3.875" part of that is the threads. As you can only count the threaded area once (threads in the product cover the threads on the barrel) so the total ADDED LENGTH to any weapons system's barrel would be about 3.350".

This item fits any weapon with a 1/2 X 28 threads WITHOUT ANY MODIFICATION. You do however need to remove the existing Flash Suppressor / Flash Hider / Muzzle Device.

This item WILL REQUIRE a crush washer in order to time the slots to the top for maximum Muzzle Brake Effect. We do NOT sell or provide crush washers. You can reuse the one from your barrel or buy them on-line.

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

Muzzle Brakes are also known as and confused with: Flash Suppressor, Flash Hider, Flash Hinder & Anti Climb Device. This however we classify as a MUZZLE BRAKE.

We test all our products to be 100% sure that they function shot after shot without any problems.

So if you are looking at doing a "Featureless Rifle" using a MFI G28 Muzzle Brake should be in compliance with the Letter and Spirit of the law.

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.

TORQUE WARNING: DO NOT over tighten any muzzle device in order to time the slots upward as the heat from shooting on an overtightened muzzle attachment will not dissipate fast enough and will crack and muzzle device due to heat expansion. 15 lbs. torque is plenty with or without the use a crush washer. Use peal washer in necessary to get the correct timing.


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.


  • MB-G28-.50X28-RH-LUG-233
  • MB-G28-.50X28-RH-LUG-233
  • MFI
  • Temporarily Not Available
  • New


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  • Item Requires Shipping
  • 0.3 lbs.
  • $1.89

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