Pistol Suppressor Questions

skatz11

Sergeant
Supporter
Full Member
Minuteman
Jun 8, 2009
546
295
40
Lexington, KY
What’s the general consensus and science behind setting up a striker fired gun for suppressed use?

I’m taking my new Omega 9K out tomorrow for the first time. Not my first suppressor. I have a few rifle cans and have my ARs tuned up to run efficiently and correctly. There’s lots of good info on that, but not much about pistol setups. It’s either they run great or don’t at all.


I’m used to tuning my pistols for USPSA. Most of my glocks are using 13 lb recoil springs and my ammo is 124gr at 1050-1070 FPS.

I keep hearing that glocks are a bad host. What variables make a good host? I’m not opposed to dedicated a new gun for this, but buying a few threaded Glock barrels was the easy button while my can was in jail.
 

Zak Smith

TBAC Guy
Supporter
Commercial Supporter
Full Member
Minuteman
The way to have the quietest 9mm pistol is to start out with one of the good 9mm cans and then shoot 165gr "HUSH" or Ammo, Inc's "STELTH" load. It is significantly quieter than regular 147gr subs.

Some guns run this without modification, while some require weaker main springs and/or booster springs (do this at own risk).

Testing our suppressor (Fly9), I found that "old" Gen2/3 Glock 19's were fine with either type (147/regular power, and 165gr extra-subs) would usually work fine. Gen5's were sprung way stiffer and I could not get a Gen5 19X to run with the 165 extra-subs. 43/43X's ran fine with both. The HK's seem to run fine with both types-- I tested USP's only though.

ETA: on the 19x, when I got a weak enough op spring, the slide would actually move during the trigger pull, to get the 165's to run
 
  • Like
Reactions: skatz11

kthomas

Sergeant
Supporter
Full Member
Minuteman
Supporter+
Jun 17, 2009
5,528
6,969
35
Tucson, AZ
I have limited experience suppressing pistols.

However the one setup I've tried, is my VP9 with SiCo threaded barrel, and Octane 45HD with booster. So far I've only tried it with 115 grain Blazer ammo, but it doesn't run reliably at all. Malfunctions every 2-3 rounds. I've read that I may need to try heavier ammo, haven't gotten around to testing that yet.
 

skatz11

Sergeant
Supporter
Full Member
Minuteman
Jun 8, 2009
546
295
40
Lexington, KY
The way to have the quietest 9mm pistol is to start out with one of the good 9mm cans and then shoot 165gr "HUSH" or Ammo, Inc's "STELTH" load. It is significantly quieter than regular 147gr subs.

Some guns run this without modification, while some require weaker main springs and/or booster springs (do this at own risk).

Testing our suppressor (Fly9), I found that "old" Gen2/3 Glock 19's were fine with either type (147/regular power, and 165gr extra-subs) would usually work fine. Gen5's were sprung way stiffer and I could not get a Gen5 19X to run with the 165 extra-subs. 43/43X's ran fine with both. The HK's seem to run fine with both types-- I tested USP's only though.

ETA: on the 19x, when I got a weak enough op spring, the slide would actually move during the trigger pull, to get the 165's to run
Thanks for the information. My gun and ammo worked great today. No malfunctions and no POI shift with my 124gr USPSA load.

I’m looking forward to loading some 147s and trying a few boxes of the 165s.

Next up is my G45 and G43x

0E9D7E6D-0B54-463C-9ADB-626D1EA6D398.jpeg
 

E. Bryant

STABILITRAK ACTIVE
Supporter
Full Member
Minuteman
Supporter+
  • Oct 25, 2010
    5,728
    7,641
    MI
    My recommendation for getting striker-fired pistols to run is to use a FN 509. I haven't had to do anything with either the full-size Tactical or the 509C other than remove the thread protector and install the can.
     
    • Like
    Reactions: kthomas

    alamo5000

    Major Hide Member
    Full Member
    Minuteman
    Jun 18, 2020
    1,309
    1,420
    I keep hearing that glocks are a bad host. What variables make a good host? I’m not opposed to dedicated a new gun for this, but buying a few threaded Glock barrels was the easy button while my can was in jail.
    What makes a Glock a less than optimal suppressor host is the same reason why they are typically regarded as "reliable".

    The tolerances in the gun are made so that they will run in almost any condition. Those slightly looser tolerances though can introduce binding when a suppressor is introduced.

    Particularly when the slide reciprocates there is more tolerance in those moving parts where when you hang a weight on the end of the muzzle things become not as free as they need to be so the slide and barrel have more friction that will lead to malfunctions.

    I'm not an expert in all handguns by any means but in general that is the main culprit behind suppressed Glocks hanging up.
     

    E. Bryant

    STABILITRAK ACTIVE
    Supporter
    Full Member
    Minuteman
    Supporter+
  • Oct 25, 2010
    5,728
    7,641
    MI
    What makes a Glock a less than optimal suppressor host is the same reason why they are typically regarded as "reliable".

    The tolerances in the gun are made so that they will run in almost any condition. Those slightly looser tolerances though can introduce binding when a suppressor is introduced.

    Particularly when the slide reciprocates there is more tolerance in those moving parts where when you hang a weight on the end of the muzzle things become not as free as they need to be so the slide and barrel have more friction that will lead to malfunctions.

    I'm not an expert in all handguns by any means but in general that is the main culprit behind suppressed Glocks hanging up.

    Don't forget that Glocks also have relatively short slide/barrel travel before the barrel unlocks. This is generally good for reliability unsuppressed but perhaps not so good for delaying the extraction process when subjected to the higher/longer impulse when running a high-backpressure suppressor, so you have the potential for improper operation.
     

    padom

    SuperMod
    Staff member
    Moderator
    Supporter
    Full Member
    Minuteman
  • Mar 13, 2013
    11,321
    6,812
    Southeastern, Pennsylvania
    I've been running 165gr N340 subs in my Gen3 G19, AR9, MP5, SIG P229 for years. Insanely quiet, stupid accurate and hits steel like a sledge.

    My favorite 9mm suppressor host....SIG P229
     

    skatz11

    Sergeant
    Supporter
    Full Member
    Minuteman
    Jun 8, 2009
    546
    295
    40
    Lexington, KY
    I've been running 165gr N340 subs in my Gen3 G19, AR9, MP5, SIG P229 for years. Insanely quiet, stupid accurate and hits steel like a sledge.

    My favorite 9mm suppressor host....SIG P229

    Which bullet are you using? I’m want to order some 165s to try out.
     

    mark5pt56

    Gunny Sergeant
    Supporter
    Full Member
    Minuteman
    Supporter+
    Nov 20, 2005
    2,210
    372
    Florida
    Rugged Obsidian 9
    Glock 19/5-Zero issues with various 115/124 and 147 loads
    Glock 45-Same
    HK VP9T-Same
    Sig X5Carry-took 300 rounds to function reliably, even leaving slide locked for 2-3 weeks during sessions. (I heard others had issues and Sig's half assed response was if not using a Sig can then they didn't want to hear it-FU sig)
     

    M4orturnate

    Gunny Sergeant
    Full Member
    Minuteman
    Jun 27, 2021
    515
    687
    Cleveland Ohio
    My recommendation for getting striker-fired pistols to run is to use a FN 509. I haven't had to do anything with either the full-size Tactical or the 509C other than remove the thread protector and install the can.
    That trigger tho...ugh. I really want to love that gun but the trigger is sooooo bad
     

    E. Bryant

    STABILITRAK ACTIVE
    Supporter
    Full Member
    Minuteman
    Supporter+
  • Oct 25, 2010
    5,728
    7,641
    MI
    That trigger tho...ugh. I really want to love that gun but the trigger is sooooo bad

    I'd like to tell you that it smooths out with time but no, that doesn't seem to be the case.
     

    The Godfather

    Private
    Supporter
    Full Member
    Minuteman
    Dec 7, 2010
    132
    25
    43
    Tagging this thread as I keep going back and forth between ordering a fly 9 today or waiting for the fly 45…

    Would the extra weight of the 45 cause more problems on a glock? Are the adapters available to get back to 1/2 28?
     

    TACC

    Major Hide Member
    Full Member
    Minuteman
  • Jan 10, 2019
    1,575
    1,453
    If you get one for the 45, make sure it is rated for 10mm.

    Trust me the 10mm suppressed with 230 grain Hardcast is a dream to shoot and they hit like a brick
     

    padom

    SuperMod
    Staff member
    Moderator
    Supporter
    Full Member
    Minuteman
  • Mar 13, 2013
    11,321
    6,812
    Southeastern, Pennsylvania
    Tagging this thread as I keep going back and forth between ordering a fly 9 today or waiting for the fly 45…

    Would the extra weight of the 45 cause more problems on a glock? Are the adapters available to get back to 1/2 28?

    My Obsidian 45 is modular...short or long config and pistons for all the different threads sizes