Looking for 9mm suppressor host. Would a ported slide be a problem?

MidwestShooter · Feb 12, 2016

First time poster here. I have my first suppressor on the way and am looking for a host for it.
This gun will just be for target, already have a SD gun.
I was looking at the 5" ported (10098) and adding a Storm Lake threaded barrel. Well low and behold a guy in my state was selling this exact pistol. To my dismay he said he was selling it because even with the solid Storm Lake barrel and his suppressor (Octane 45). He was hit in the face with excessive blowback. His glock and HK (both non ported) did not have the problem. When he removed the can the problem went away. So he figured the ported slide was the issue and wanted it gone.
Talking with silencer shop and the manufacturer of my particular suppressor. They recommended going with a stronger recoil spring to increase lockup time and reduce blowback.
Anyone have experience with adding a suppressor to one of the ported models?
To save some coin I was looking at the 10267 model which included both the ported and solid threaded barrels.
Thanks for the input.

V0OBWxZS16 · Feb 15, 2016

I have shot a suppressed 10098 and did not have any gas in the face.

Fishinfool · Feb 15, 2016

Never shot a pistol with a suppresser and a ported barrel, but I don't see how it would work effectively with blast coming from the ports? Porting on the slide, along with a solid barrel, should, I would think, have no effect on "blow back". If the blow back is coming from the ejection port, as in the gun unlocking too early, then maybe a heavier spring would help. I guess it is possible the porting holes cut in the slide might effect how long the gun stays locked with a can attached due to the slight slide weight reduction. A heavier recoil spring is a cheap enough fix to try, if you experience this problem

Larry

vipermd · Feb 15, 2016

As Fishinfool stated you are defeating the purpose of the suppressor, when you have a ported barrel. The suppressor will cause back pressure, and possibly get blow back from the chamber. The ( 10098) M&P 9 performance center, which is does not have a threaded barrel. Possibly from the ports? Does anyone make a threaded & ported barrel?? You will have a booster on the Octane so it will cycle the 9mm, with ports I would believe you will have problems. Be Safe,

mkbruce · Feb 15, 2016

Ported barrel with a suppressor makes no sense - I doubt you could even find a thread AND ported barrel.

But, putting a standard (non-ported) threaded barrel in the 9FS PC will work just fine. The fact that the slide is ported won't make any difference.

McE · Feb 15, 2016

Sounds like OP is talking about non-ported barrel and a ported slide.
Stiffer recoil spring I guess would make up for whatever effect the lightened slide would have in terms of lockup time.
But I wouldn't say the slide porting is the only reason if you're comparing it to differently designed guns that don't have ported slides. It could be an M&P thing, as they do have a more pronounced frame/slide gap than those Glocks and HKs.

But then again the guy was selling something and may have just given some cockamamie reason to unload it.

V0OBWxZS16 · Feb 15, 2016

He means a non-ported barrel in a ported slide.

We got similar responses from more than one person while shooting it.

MidwestShooter · Feb 15, 2016

V0OBWxZS16 said:
He means a non-ported barrel in a ported slide.

We got similar responses from more than one person while shooting it.

Exactly. Sorry if I wasn't clear in my post.
I would only run the can with a solid threaded barrel like Storm Lake offers for the 5" M&P.
I have a Tirant9 can in jail until around Sept. I am thinking the Tirant will probably have more back pressure as his was made for a 45?
This is theory on my part as the suppressor thing is new to me.
Love the looks of the 10098 and want to make it a multitasking pistol. Without the can I would have the flat shooting accuracy of the 5" and ports.
With the can I would have a quiet 9mm with the great aesthetics of the ported slide.

McE · Feb 15, 2016

Well, gas blowback is only really a problem if you shoot without eye pro and your mouth open lol

Smitty357 · Feb 15, 2016

Actually ported barrel with a suppressor makes alot of sense. In the case with rifles for instance. The ported barrel reduces the velocity of HV ammo and turns it into subsonic ammo. This combine with a suppressor is very cool. No need to buy subsonic ammo to defeat the "crack" purpose.

McE · Feb 16, 2016

Smitty357 said:
Actually ported barrel with a suppressor makes alot of sense. In the case with rifles for instance. The ported barrel reduces the velocity of HV ammo and turns it into subsonic ammo. This combine with a suppressor is very cool. No need to buy subsonic ammo to defeat the "crack" purpose.

.......................................................................

Smitty357 · Feb 16, 2016

McE said:
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Remember we said that ported barrels reduce velocity. Obviously when u reduce velocity it means u slow the projectile down.

[ame="https://www.youtube.com/watch?v=DZJdMLvvbsM"]https://www.youtube.com/watch?v=DZJdMLvvbsM[/ame]

V0OBWxZS16 · Feb 16, 2016

MidwestShooter said:
Exactly. Sorry if I wasn't clear in my post.
I would only run the can with a solid threaded barrel like Storm Lake offers for the 5" M&P.
I have a Tirant9 can in jail until around Sept. I am thinking the Tirant will probably have more back pressure as his was made for a 45?
This is theory on my part as the suppressor thing is new to me.
Love the looks of the 10098 and want to make it a multitasking pistol. Without the can I would have the flat shooting accuracy of the 5" and ports.
With the can I would have a quiet 9mm with the great aesthetics of the ported slide.

You were perfectly clear. The idea just seems to throw a curve ball into people's thinking.

We were shooting a 9mm SilencerCo Osprey. I've gotten to shoot a few different suppressed pistols, including other cans on non-PC M&P pistols, and I don't recall any combination causing a blowback issue. I do not have an explanation for his reported results. The 10098 shoots nicely with or without a can IMHO.

Smitty357 said:
Actually ported barrel with a suppressor makes alot of sense. In the case with rifles for instance. The ported barrel reduces the velocity of HV ammo and turns it into subsonic ammo. This combine with a suppressor is very cool. No need to buy subsonic ammo to defeat the "crack" purpose.

I thought we were discussing muzzle mount suppressors on conventional pistols and not integral suppressors on sub-machine guns and .22 rifles. Is this why you keep insisting that the PC Shield loses too much velocity? You're confusing the porting designed for an integrally suppressed rifle with pistol porting for reduced muzzle flip?

CB3 · Feb 17, 2016

Smitty357 said:
Actually ported barrel with a suppressor makes alot of sense. In the case with rifles for instance. The ported barrel reduces the velocity of HV ammo and turns it into subsonic ammo. This combine with a suppressor is very cool. No need to buy subsonic ammo to defeat the "crack" purpose.

We are talking about an M&P pistol mounted suppressor in this thread, right?

A ported M&P barrel with a muzzle mounted suppressor makes no sense. The ports would be in the barrel with high velocity gas escaping from the ports before it reaches the suppressor, thereby completely defeating the desired sound reduction of the suppressor.

If Smitty is writing about porting in the barrel of an integrally suppressed or reflex type suppressor on rifles or handguns with fixed barrels, then that is a completely different discussion. That is way off topic.

Hotshot9 · Feb 17, 2016

Keep us posted as to what you do. I'm also looking to add a can to my performance center 9mm and adding a non ported 5 in barrel. Even though mine shoots great as is. Very nice grouping at 25 ft no bench.
I need the extra barrel for ppc shooting with friends.they won't allow ported barrels.

Smitty357 · Feb 17, 2016

V0OBWxZS16 said:
I thought we were discussing muzzle mount suppressors on conventional pistols and not integral suppressors on sub-machine guns and .22 rifles. Is this why you keep insisting that the PC Shield loses too much velocity? You're confusing the porting designed for an integrally suppressed rifle with pistol porting for reduced muzzle flip?

No because velocity is lost no matter what barrel u are running it through when its ported. And its lost even more through shorter barrels because the bullets already dont have time to reach the HVs as rifles. Thats why HV ammo through a pistol and a suppressor is quieter (slower velocity) than the same ammo through a rifle.........Ported is velocity loss, no matter how u look at it. Thats the common sense part.

McE · Feb 17, 2016

Nobody is talking about ported barrels. That's first and foremost.

But on the point of porting causing velocity loss in pistol barrels, it would be as trivial as probably quarter inch of barrel length difference. Velocity fluctuations between individual cartridges is greater than effects of porting, so if the point is to be an irrelevant theoretical nitpick, I will stay out of that discussion.

MidwestShooter · Feb 23, 2016

Hotshot9 said:
Keep us posted as to what you do. I'm also looking to add a can to my performance center 9mm and adding a non ported 5 in barrel. Even though mine shoots great as is. Very nice grouping at 25 ft no bench.
I need the extra barrel for ppc shooting with friends.they won't allow ported barrels.

To save some cash I will probably wind up with the 10267 model (4.45" barrel) as it includes both the threaded and non threaded barrels. Although before I buy I'll need to either shoot it with a can or hear from others who have. I would like to see for myself how much blowback comes out the ports.

V0OBWxZS16 · Feb 24, 2016

Blowback from the slide ports? Absolutely none. Any blowback comes from the ejection port after the slide and barrel unlock.

V0OBWxZS16 · May 16, 2016

Thought I'd bump this one. It works just fine. With the standard recoil spring I only got a slight amount of gas on a couple rounds. A heavier recoil spring seemed to help, but the new MRDS blocks the gas anyway.

Looking for 9mm suppressor host. Would a ported slide be a problem?

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