Why Is My Sig516 So Damn Loud?

[Emperor]

Noticed yesterday that the Core 556 I was shooting was considerably less loud than the SIG. Both have typical flash hiders.

What could be the difference? Both rifles have similar barrel lengths.

This is the Sig's FH


This is the CORE's


It can't be this simple deviation, can it?

 

[madwabbit]

ah, this is easy.

yours is a male.

 

[enutees]

Same ammo?

I can't see the pic of the CORE flash hider for some reason.

I know I've noticed quite a bit of difference in AR sound based on flash hiders/brakes and of course barrel length.

 

[Emperor]

Same ammo?

I can't see the pic of the CORE flash hider for some reason.

I know I've noticed quite a bit of difference in AR sound based on flash hiders/brakes and of course barrel length.

Same ammo (PMC), same mags.

And when I say considerable difference, I mean it. You can feel the concussion more too.

 

[Emperor]

Wow! No theories? Suggestions, from you hard core rifle guys?

Will a muzzle break do any good for this?

 

[SpeedRacer]

All things else being equal, I would assume it's the muzzle device. Try swapping them or shooting them both sans-muzzle device and see what happens.

It's odd though, they are both flash hiders. The one on the Sig is similar to the Smith Vortex. They are noted for their unique ping sound, but never noticed them being louder. Putting on any brake/compensator would certainly be even louder though.

 

[Emperor]

All things else being equal, I would assume it's the muzzle device. Try swapping them or shooting them both sans-muzzle device and see what happens.

It's odd though, they are both flash hiders. The one on the Sig is similar to the Smith Vortex. They are noted for their unique ping sound, but never noticed them being louder. Putting on any brake/compensator would certainly be even louder though.

I will try this the weekend. I will record the audible differences on video and post them. It really is weird.

 

[hdfinder47]

All things else being equal, I would assume it's the muzzle device. Try swapping them or shooting them both sans-muzzle device and see what happens.

It's odd though, they are both flash hiders. The one on the Sig is similar to the Smith Vortex. They are noted for their unique ping sound, but never noticed them being louder. Putting on any brake/compensator would certainly be even louder though.

This^
Swap 'em and see what happens. I'd be interested in the results.

 

[petingrass]

All things else being equal, I would assume it's the muzzle device. Try swapping them or shooting them both sans-muzzle device and see what happens.

It's odd though, they are both flash hiders. The one on the Sig is similar to the Smith Vortex. They are noted for their unique ping sound, but never noticed them being louder. Putting on any brake/compensator would certainly be even louder though.

I have the same FH.it may be my imagination, but it did sound a teensy bit louder after I swapped it out, but I didn't get a chance to testvside by side.

 

[spec50trout]

Have to agree with Speed about brakes and compensators. I will probably get crap for this but an A2 acts a lot like a break, in that the gasses/noise are vented laterally from the muzzle. An A2 IMO, is a very loud muzzle device in general.

You might look into a Black River Tactical Covert Comp, or other linear type devices that send gasses/noise downrange away from shooter. I have the BRT on a 6.8 and can attest to it's effectiveness. Also, AR 15 Performance has some devices that are well respected. I have never used these but do have a shorty brake on the way. Just an unsolicited opinion.

 

[doc ace]

It is the muzzle device. I had one of those M+M M10 AK47s and it had the tapco four blade RAZR breeching flash hider like that, and it had such a frickin high pitch ring and crack as it fired. Those 3 blades/forks are amplifying the sound like a tuning fork man. Also that A2 birdcage flash suppressor is projecting the sound waves up and out, and not in all directions like that three prong device.

 

[DBMJR1]

They both make the same amount of noise, it is just directed differently.

 

[mnop308]

*1 for the black river. I have them on my Ruger Gunsite Scout and Mini 14 and they make all the difference in the world. You can really tell that it sends the blast downrange. I have an AR with a AK74 brake, and it is just downright nasty to shoot. My neighbors at the range hate it.

 

[EonDresari]

I have a retro build AR with a M16 duckbill flash hider on it and it sounds considerably louder than my A2 one, same barrel length, ammo, etc.

 

[CHW2021]

Download a (free) decibel meter ap for your phone and measure the sound. Sometimes sounds seem louder or more uncomfortable due to pitch more than volume.

 

[madwabbit]

... or its just a male.

 

[dtd80]

It has to be the flash hider. Some new designs have unequal lengths to dampen the resonance created. It was explained on a shot show video on youtube.

 

[Hitman]

Must have missed this one.

Just looking at the pics and not reading your OP
I instantly thought which ever one he is talking about being loud
has got to be the top one.

Turns out, that is the one you were referring too.

I'll start this off with (I THINK) .....

The sound is muffled more by the MIL-SPEC suppressor(Bird Cage)
b/c it has more ports to travel through, thus baffling the noise some.

The AA Blackout however doesn't have any ports,
just slots with no end ring like the birdcage does.
Less baffle, less places for gas to travel through
thus allowing for all the gas out at a faster rate,
thus increasing the report of the rifle in every direction.

The report of a rifle is dependent on how the explosion is directed.
Up, down, flanked, back towards you like some Brakes direct it,
or all forward like other compensators do.

Like DBMJR1 mentioned, you're really just guiding the same
noise, in a different direction(s).

Every port, slot or end cap will all affect the amount of sound it projects
and where it projects it.

Some baffle the noise more than others.
In this case, it's clear there is no baffling whatsoever from the AA Blackout.

For a visual example. Check this out.

This is the Snake Hound Machine(SHM) Loudner.
(Yes....a device to make your rifle report LOUDER!)

Can you see why?

Two huge ports! sound goes to the flank and back some
b/c of the end cap.


Now this the DPMS Levang Noise Reducing Compensator.

See?


Muzzle Brakes are (usually) louder than Flash Suppressors.
But not always. It still depends on the ports, slots, angles and design.

 

[Emperor]

Must have missed this one.

Just looking at the pics and not reading your OP
I instantly thought which ever one he is talking about being loud
has got to be the top one.

Turns out, that is the one you were referring too.

I'll start this off with (I THINK) .....

The sound is muffled more by the MIL-SPEC suppressor(Bird Cage)
b/c it has more ports to travel through, thus baffling the noise some.

The AA Blackout however doesn't have any ports,
just slots with no end ring like the birdcage does.
Less baffle, less places for gas to travel through
thus allowing for all the gas out at a faster rate,
thus increasing the report of the rifle in every direction.

The report of a rifle is dependent on how the explosion is directed.
Up, down, flanked, back towards you like some Brakes direct it,
or all forward like other compensators do.

Like DBMJR1 mentioned, you're really just guiding the same
noise, in a different direction(s).

Every port, slot or end cap will all affect the amount of sound it projects
and where it projects it.

Some baffle the noise more than others.
In this case, it's clear there is no baffling whatsoever from the AA Blackout.

For a visual example. Check this out.

This is the Snake Hound Machine(SHM) Loudner.
(Yes....a device to make your rifle report LOUDER!)

Can you see why?

Two huge ports! sound goes to the flank and back some
b/c of the end cap.


Now this the DPMS Levang Noise Reducing Compensator.

See?


Muzzle Brakes are (usually) louder than Flash Suppressors.
But not always. It still depends on the ports, slots, angles and design.

Sounds logical.

I haven't had the opportunity to change the hiders and see if it makes a difference yet, but fully intend on it.

Whatever it is causing this; it's loud!

 

[Harrisracing]

Umm...One is a PISTON gun and the other is a DI gun?!

You aren't comparing apples to apples here.

That and one of the muzzle devices is male and the other is female.