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MCX Rattler in 5.56mm Flash Hider Removal

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flash hider mcx parts
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Discussion starter · #25 ·
Rexorcist said:
Had a chance to revive...found the right socket for flash hider and tried to move with a breaker bar/vice...nada..seems to be attached/brazed? Got scared and gave up...for now..Anybody successfully removed?
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Rexorcist, the flash hider IS pinned & welded/brazed. You will break it if you continue. I have a letter from Sig confirming this! Plus! Assuming your weapon is 5.56 NATO version, you will be getting into a real problem if you try & change the flash hider. The 5.56 version is gassed different than the 300 BO version. This is why they say the 5.56 version cannot be suppressed. The gas system is different between the two! Any replacement flash hider would need to match exactly the size & placement of the OEM gas system for the MCX to function for a second & subsequent shots. The MCX 5.56 version gas system is in/at the flash hider...............

Could it be done? Probably, but is it worth the effort, considering the minimal improvement you would receive would be only a slight better noise reduction. Could you modify a suppressor to function? Maybe. But don't you think that Sig would have done that as an option for the military if it was reasonably doable? The problem is in the gas system used in the 5.56 version.

There is advice elsewhere on how to remove pinned & brazed flash hiders from barrels But you are opening up a can of worms. Not to mention that YOU instantly become a felon, when you remove the hider................
 
Discussion starter · #27 ·
Steve Shannon said:
He already explained that he ground off the weld and removed the pin.

How does he “instantly become a felon” by removing the muzzle device?


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Steve Shannon: You are correct. My mistake. I confused discussions I was having about legalities on a "rifle" that removing the flash hider caused the barrel to be under the legal length for that other rifle. I also did not read far enough back. My bad. He still needs to understand the gas system issues with doing this............ I don't think that just replacing the flash hider is going to work without additional modifications. I hope he succeeds!!!!

DansSIGs: Have you actually removed the flash hider on an MCX in 5.56????? Just wondering.
 
#29 ·
btvarner said:
Steve Shannon: You are correct. My mistake. I confused discussions I was having about legalities on a "rifle" that removing the flash hider caused the barrel to be under the legal length for that other rifle. I also did not read far enough back. My bad. He still needs to understand the gas system issues with doing this............ I don't think that just replacing the flash hider is going to work without additional modifications. I hope he succeeds!!!!

DansSIGs: Have you actually removed the flash hider on an MCX in 5.56????? Just wondering.
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I agree. The muzzle device on a Rattler in an integral component of the gas system, which is probably why SIG pins and welds them in the first place. Certainly that functionality could be duplicated but I don’t know of any current devices that provide equivalent functionality and provide a suppressor mount.


Sent from my iPad using Tapatalk
 
#30 ·
Newcomers to the thread keep using the word ‘suppressor’ when many/most of us interested in this are so for other reasons than suppression. It’s been widely clarified in previous posts that a barrel of this length with the expansion that 5.56 requires would annihilate most suppressors. A blast control device, however, would be a great addition to this weapon by moving that concussive explosion further from the shooter while still allowing it to spread out upon existing the barrel. Tacticool Bonus: many BCDs look a whole lot like suppressors from a profile view.
 
Discussion starter · #31 ·
über said:
Newcomers to the thread keep using the word ‘suppressor’ when many/most of us interested in this are so for other reasons than suppression. It’s been widely clarified in previous posts that a barrel of this length with the expansion that 5.56 requires would annihilate most suppressors. A blast control device, however, would be a great addition to this weapon by moving that concussive explosion further from the shooter while still allowing it to spread out upon existing the barrel. Tacticool Bonus: many BCDs look a whole lot like suppressors from a profile view.
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uber: Yes. This is what my original intention was when I started this thread, to see if I could use a " Noveske Flash Hider" on my 5.56 MCX. In order to move much of the concussion forward of the shooter. I have such a device on my DD Mk18 and it works well. I would still like to do that. I am sure that with a lot of engineering it is possible to configure some method to accommodate interaction with the gas system, I just do not want to be the first person ever to try this................ The only person who seems to have knowledge on the removal of the Sig MCX flash hider is DansSIGs. I would still like to here a response from him as to whether his experience is with the 5.56 or 300 BO versions.
 
Discussion starter · #32 ·
btvarner said:
uber: Yes. This is what my original intention was when I started this thread, to see if I could use a " Noveske Flash Hider" on my 5.56 MCX. In order to move much of the concussion forward of the shooter. I have such a device on my DD Mk18 and it works well. I would still like to do that. I am sure that with a lot of engineering it is possible to configure some method to accommodate interaction with the gas system, I just do not want to be the first person ever to try this................ The only person who seems to have knowledge on the removal of the Sig MCX flash hider is DansSIGs. I would still like to here a response from him as to whether his experience is with the 5.56 or 300 BO versions.
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I just now see that under DansSIGs name, it says he is "Banned". If that is what it means, maybe we should not put much stock in his comments? Just saying..............
 
#40 ·
gianfrancopp said:
Is it 100% threaded? I have been trying to twist it, and I twists a little bit... Anybody thought about it being pressed?
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Hey, new here but hope this helps. The barrel is not threaded at all and is held in the muzzle/gasblock by 2 pins. The barrel stops about half inch before the blast baffle on the device just behind the flash hider. The flash hider is not threaded on and appears to be one welded piece with the blast baffle. Pics attached. With that being said my gunsmith was able to machine it to take a silencerco flash hider and it runs great with and without the can.8 new photos by B Street
 
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