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M400 Tread non-Sig compensator

This is a discussion on M400 Tread non-Sig compensator within the SIG Sauer Rifles forums, part of the SIG Sauer Forum category; Curious if anyone has swapped out the flash hider with any other compensator/muzzle break/ flash hider that’s not from Sig? If so was there any ...


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Old 07-30-2020, 07:30 PM   #1
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M400 Tread non-Sig compensator

Curious if anyone has swapped out the flash hider with any other compensator/muzzle break/ flash hider that’s not from Sig? If so was there any issues or additional hardware needed?
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Old 07-31-2020, 03:48 PM   #2
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OP,
How long is the Bbl on your M400?
16" + device length
or
16" w/ device

Pistol length Bbl will probably have a pinned device to make it compliant w/ BATFE.
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Old 08-01-2020, 01:12 AM   #3
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Quote:
Originally Posted by 6seven5r View Post
Curious if anyone has swapped out the flash hider with any other compensator/muzzle break/ flash hider thatís not from Sig? If so was there any issues or additional hardware needed?
I have used the VG6 Epsilon muzzle brake on several of my Sig rifles, including a couple of M400s. If timing of the brake for proper alignment is an issue, you may need to use the "collar" that Sig makes to convert the tapered barrel end to a solid base. If it times correctly otherwise, then you wouldn't need that washer. If the barrel is 14.5, you will need to do a pin and weld to make it legal. Most muzzle brakes are sufficiently long enough for this purpose and many have a predrilled hole in the base at 6 o'clock for the pin.
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Old 08-01-2020, 05:49 AM   #4
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Quote:
Originally Posted by 6seven5r View Post
Curious if anyone has swapped out the flash hider with any other compensator/muzzle break/ flash hider that’s not from Sig? If so was there any issues or additional hardware needed?
If from sig or not, just need the correct muzzle device(MD) for that particular chamber. Anything labeled 223/556 will be 1/2x28 unless otherwise noted(very rare) anything in 308(6mm - 308) uses 5/8x 24 threads. 3/4x24 is for the really big stuff 338 ect. Only exception is 9mm which sometimes has threads for metric, 13.5 LH threads or standard 1/2x28.

Example picking out your thread pitch is also choosing your bore size.

https://deadairsilencers.com/product...uzzle-brake-2/

Also youtube is your friend. 95% of it will apply. May need an mcx taper cap. https://youtu.be/fC5C4URJTcE
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Old 08-02-2020, 10:20 AM   #5
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Awesome, thank you guys. This was helpful.
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