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CLOSEOUT 3.875" Long Lug MFI HK G28 DMR Style Muzzle Brake / Flash Enhancer for any weapon with 1/2 X 28 threaded barrel / SUPER SALE. (NOT 2018 California Compliant) Found just a few.

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


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NEW 3.875" Long Lug MFI HK G28 DMR Style Muzzle Brake / Flash Enhancer (NOT 2018 California Compliant) for any weapon with 1/2 X 28 threaded barrel.

Let's talk briefly about Flash Suppressors vs. Muzzle Brakes and Flash Enhancers. I cover this in greater detail below, but this point needs to be addressed at the very beginning.

The Very Definition of a "Flash Suppressor" means that some "FLASH" is suppressed.

90% of all "quote" commonly referred to as "Flash Suppressor" actually do not suppress any flash.

Muzzle Brakes in general also do little or no flash suppression, but rather re-direct the flash.

We can NOT call our G28 Muzzle Device a "Flash Suppressor" or a "Muzzle Brake" given the definitions quoted by the Ca. DOJ or the Flow Chart found on the CALGUNS.NET web site as neither is applicable.

While our G28 Muzzle Device may look at first glance to an uneducated person like the "Evil" Flash Suppressor so feared by the Anti-Gun Idiots, it is in fact a "FLASH ENHANCER". As we clearly state below our through hole is not limiting nor do the slots reduce the flash in any manner. When photographed at night the muzzle flash from one of our G28s appears to actually increase the size of the flash. Increasing the size of the muzzle flash from what would be that from no device attached to the barrel is a physical impossibility. It is instead more noticeable as the pattern of the flash is increased in surface area making it appear to be larger than without any device in place. Here is a photo of the MFI G28 Flash Enhancer in action.

MFI 28 Flash Suppressor Test proof that it is a Flash Enhancer

Here is a photo taken at this past Knob Creek's night shoot. Does this look to you like a "Flash Suppressor"?

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.

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."

  • Simulated Lugs the type found on the new HK DMR G28 rifles.
  • 100% Made in the USA!
  • Designed for LIVE FIRE.
  • The made of Weapons Grade Steel.
  • Heat Treated to about Rockwell 28. .
  • Precision CNC machined from billet.
  • Threaded 1/2 X 28 tpi Right Hand
  • Maximum Length: = 98.30mm or 3.875 inches.
  • Maximum Barrel Extension: = 85.75mm or 3.375 inches.
  • Maximum I.D. @ 0.465"
  • Weight: 4.0 ounces!
  • Mil. Spec. Deep, Deep Gray (near black) Phosphate Parkerized to give the unit a semi matt finish.

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 3.25".

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

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. This however we classify as a FLASH ENHANCER.

These are designed for LIVE FIRING.

We test all our Flash Enhancers 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 Device / Flash Enhancer has as they are designed to mimic the external appearance of their Military Counterparts. The fact is that all our Flash Enhancers 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.

NOTE: DeGroat Flash Enhancer like the MFI G28 Flash Enhancers does NOT actually increase the muzzle flash. The difference is and why the DeGroat appears to be so much more noticeable is that the vents are pointed backwards towards the shooter. We do not do this as the DeGroat while entertaining as it is... really blinds you and it vents gas back onto the shooter's face instead of off to the side like the MFI G28 is designed to do.

NOTE CALGUNS Flow Chart Definition: BATFE recognizes this product and 99% of all muzzle devices as "Muzzle Brakes" or "Muzzle Devices" as they do NOT meet the 1989 or 1993 crime bills definition of a Flash Suppressor given how little most muzzle devices actually reduce flash. Ca. DOJ has never ruled on any of the "Compliant Parts" meaning never on the "Bullet Button" or any other accessory. There is a definition that is found on the CALGUNs flow chart which is what CALGUNs believes is the interpretation of the Ca. DOJ in regards to a Muzzle Brake vs. a Flash Suppressor. BATFE ruled that in order for a muzzle device to be a "Flash Suppressor" it had to suppress at least 65% of the flash. BATF found through testing that the ONLY devices that actually met this criteria were open pronged muzzle devices like the early Colt AR15 SP-1 3 Prong Flash Hider and the SIG 552 3 Pronged Flash Suppressors. In fact both of these nearly negate all of the flash, where as all other Bird Cage Style devices (including this one) did not meet that criteria of suppression. Thus BATFE views this item as anything but a "Flash Suppressor". The CALGUNs definition is clear that in order to be a Muzzle Brake in CA the exit hole must reduce in size, which ours does NOT.

That being said our product does NOT suppress any flash and in fact through our testing and above photograph clearly demonstrates "FLASH ENHANCEMENT" and NOT "Flash Suppression".

So, while this item is NOT a Flash Suppressor it is also NOT a Muzzle Brake as it lacks the two main features of any muzzle brake i.e. anti-rise and anti-recoil characteristics. For these reasons if you are looking at doing a "Featureless Rifle" using a G28 Flash Enhancer it may or may not be in compliance, as it all depends on how your interrupter the new law. It should be in compliance as it does not suppress, but rather enhances the muzzle flash, whether or not it can be seen as diverting any of this flash away from the field of view is a matter of opinion as that has not been spelled out in the law as a solid definition yet. The field of view is anything in front of the shooter and it would be hard to claim that with a fire ball this size that any shooter could not see it in all respects. Ultimately this is a question for a CA. DOJ Registered FFL who is doing the conversion. Always go with what they recommend.

The MFI Barrel Extension / Muzzle Brake / Flash Enhancer 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-.50X36-RH-LUG
  • FS-G28-.50X36-RH-LUG
  • MFI
  • Temporarily Not Available
  • New


Shipping Information

  • Item Requires Shipping
  • 0.3 lbs.
  • $1.85

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