Will 9mm compensator work on .357 sig barrel?

[ilikegunspdx]

Found these 9mm compensators laying around and wondering if I can use them on my .357 sig Glock barrel. Some places list .357 as 002" larger bullet diameter while others list then both as .355". Anybody know? Thx!

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[JuglansRegia]

I believe 357 sig uses .355 boolits. I would be more concerned about the threads though, that brake looks like it's meant for a PCC l have never seen a brake like that hanging off the barrel of a glock.

 

[edzz]

You know that a dollar bill is .0043 inches, so over 2 times the .002 you are questioning.
If you measure the thru hole on this break you will find ALOT more clearance than you seemingly expect.

 

[Nosferatu]

Yes you can use it.

.357 Sig uses the same .355" bullets as 9mm.

.357 Magnum uses a .358" bullet.

 

[Xmark1]

I use .355 to reload for my 357sig.
The only difference is that the ojive for a sig is different.
Longer shank and truncated ojive.

 

[The Heretic]

I believe 357 sig uses .355 boolits. I would be more concerned about the threads though, that brake looks like it's meant for a PCC l have never seen a brake like that hanging off the barrel of a glock.

This.

I don't know about Glock .357 SIGs, but I know SIG pistols in .357 have a larger outer diameter barrel than the 9mm barrels because the slides are made to take either .40 or .357 barrels. I would bet that Glocks are the same.

 

[ilikegunspdx]

This.

I don't know about Glock .357 SIGs, but I know SIG pistol in .357 have a larger diameter barrel than the 9mm barrels because the slides are made to take either .40 or .357 barrels. I would bet that Glocks are the same.

Not sure I understand this concern. Threads are outside of the slide. In this case even further from the slide due to 6" .357 sig barrel on a Glock .22.

 

[The Heretic]

Not sure I understand this concern. Threads are outside of the slide. In this case even further from the slide due to 6" .357 sig barrel on a Glock .22.
View attachment 1978201

But the barrel is still a larger OD to fit the same slide.

Go ahead, and measure the barrel ODs for .357 & 9mm and you will find they are different.

 

[ilikegunspdx]

But the barrel is still a larger OD to fit the same slide.

Go ahead, and measure the barrel ODs for .357 & 9mm and you will find they are different.

What does it matter the threads are still 1/2 x 28 (see pic).

 

[TTSX]

As long as it's 1/2x28 threads and the barrel shoulder sits flush or proud of the comp, there will be no issue at all. The issue would be if the barrel shoulder has to fit inside the comp at which point the only thing that'll stop you is the ID/OD delta which could be fixed with a mill or lathe. I say go for it.

 

[The Heretic]

What does it matter the threads are still 1/2 x 28 (see pic).

It doesn't if the threads are the same as the comp/etc., but some .40/.357 barrels have 9/16" threads.

 

[ilikegunspdx]

It doesn't if the threads are the same as the comp/etc., but some .40/.357 barrels have 9/16" threads.

Ah ok I'm following you now. Threads are the same 1/2x28 on barrel and comps.

 

[titsonritz]

The .357 Sig is .40 S&W case necked down to use a 9mm bullet (.355"), so yes, assuming the threads of MD are compatible with the barrel, it will work.