I’m glad you started this thread. I own an MPX K manufactured in Dec. 2021. The gun is deadly accurate out of the box. 1” groups all day long. Like you, I wanted to suppress it with a Wolfman. I installed a ILWT Trilug adapter and took it to the range. The accuracy went to hell in a hand basket. The gun shot a 5-6” spread (without a silencer, just the adapter on). Took the Trilug off and it went back to 1” groups. Very weird. I bought a “Rugged” Trilug and tried that one. Same thing this time 4-5” spread. Took that Trilug off and the gun shot 1” groups again. I decided that my gun just does not like adapters of any kind. I emailed Sig and they said since the trilugs were not made by Sig Sauer they couldn’t speak to them. But they did say the more stuff you add to the barrel the more accuracy will suffer. I eventually ended up buying a Sig Modx-9 and prayed for it to work. I assumed since it was a Sig product and it was directly threaded to the barrel that it just might work. My assumption paid off. I shot it at the range the other day and it shot 1” groups at 25 yards all day. Whew! That was an expensive gamble that paid off. I couldn’t be any happier with it. Sounds good too. So one option you could try is to direct thread your Wolfman to the barrel if you are having accuracy issues at all. Some people don’t. I did a lot of other things too along the way but it’s too much to write here. If you have any questions about those things PM me.

 

Welcome from PA. My MPX is accurate out of the box.

 

@TacoJoe Excellent explanation! This is the exact information we all need. I did contemplate the idea of direct threading the can since a lot of people seem to be reporting issues with adapters that go on the barrel side. Not sure if there is a good Wolfman suppressor adapter that would work with the weird thread the OEM Sig barrel has.

So far the only option I have found to direct thread the Wolfman to the stock 4.5 barrel is this:

 

@TacoJoe Excellent explanation! This is the exact information we all need. I did contemplate the idea of direct threading the can since a lot of people seem to be reporting issues with adapters that go on the barrel side. Not sure if there is a good Wolfman suppressor adapter that would work with the weird thread the OEM Sig barrel has.

So far the only option I have found to direct thread the Wolfman to the stock 4.5 barrel is this:
View attachment 440822

Yes Dead Air sells a Direct Thread adapter for the Wolfman with 13.5x1LH.

 

There are allot of people running the MPX suppressed. It would be great if all aftermarket accessories worked perfect on everything. But in the case of the MPX it’s a picky fire arm. Some stuff works and some doesn’t. So far I have seen that all Sig designed 9mm suppressors work on the MPX. The SRD9 and now the Mod X-9 both run on them. What’s nice to see is that a gun that didn’t run a trilug will run the Mod X-9.

I would love to see the guy on the MAC You Tube channel try a mod X-9 on the “bad” barrels. He has single handedly created allot of bad press for the MPX.

 

The MPX has generated plenty of it's own "bad press", even without MAC's videos. There are plenty of us who have been unable to achieve acceptable accuracy suppressed, even with direct thread suppressors.

I own a CGS 9mm suppressor that works exceptionally well on every firearm I've used it on, except for my MPX. Even direct thread, on the factory barrel, the accuracy is horrible. "Sorry, but buy one of our suppressors" is a **** poor solution, that has soured many owners on the MPX. Myself included.

 

@TacoJoe Thats a bummer, I really like the look of the Wolfman. I wish I could bring myself to like the Sig suppressors but im really not diggin that weird pattern look on the exterior. My other option would be the Obsidian 9 but I haven’t seen a comparison between that one and the Wolfman. There’s gotta be some guys here that have first hand experiences with them

 

@PRPRO I have shot a obsidian 9 I really liked the deep tone it had. It’s built like a tank. I think it will fit under the MPX hand guard. Either way though, ModX-9 or Obsidian 9, you are gonna cover most of it with a 8” handguard. You’ll only see about 3” of it anyway. If I were to buy a Wolfman, which I still may do, I would use the direct thread and not use the extended hand guard. It will look B.A. in the K configuration on your MPX.

 

The plus is the Mod X-9 is modular. You can make it smaller and fit the entire thing under the hand guard and never have to see it.

 

Yeah, saw those trilug reports too. My MPX-K's direct thread Wolfman mount works good with only operator/my accuracy issues. Here's Wolfman's shortie version mounted under Lancer's 8" handguard and PA's Cyclops MicroPrism sight. This prism optic works great with my old astigmatism eyes - No starburst!!

Cheers

 

@kansascity45 Im glad to see a hand guard that will fit the Wolfman. Does your hand guard get too hot when shooting a lot?

What other hand guard were you looking at before pulling the trigger for that one?

 

Yeah, have the Midwest Industries' alloy 8" MPX handguard too. MI's slightly tighter fit for Wolfman, but still works. I perfer carbon fiber's feel, and have run Lancer on several ARs. The 10" 5.56 SBR with 12" Lancer over SOCOM556-RC can did heatup pretty quick, but MPX 9mm's no problem.

Here's MPX with the Midwest handle, Lancer's fit with Wolfman and the 10" SIG 516 with Surefire's can.

Cheers

 

Any first hand experience here with the ILWT Tri-Lug barrel and a suppressor? Still accuracy issues going that route?

 

What about the ILWT barrel that comes with the Tri-Lug integrated in it? Its a fixed Tri-Lug, so its one less moving part, any experience with that one?

These are the ones im talking about:

 

I have heard that they are good barrels. But I’ve also heard from one that their best group was 2”. We need to get someone to comment here who actually owns one and see if that fixed their suppressed accuracy issue. Hopefully someone will come along.

 

I wouldn’t get to wrapped up in one torque value vs the other. There is allot of math that goes into determining a bolts specific torque value. The engineers have these values during design and redesign so they set the values and it makes it to the manual for that gun.

• Tensile failure of the bolt body. (bolt shank and head)
• Shear failure of the bolt threads. (bolt thread strength)
• Shear failure of the internal threads. (nut thread strength)
Depending on the nut system and material will change the torque value greatly. A steal nut can handle a much higher value than aluminum. Also there are varying grades of steel and what each one can handle.

I honestly haven’t seen the manual and gun that says 60 inch lbs. I would be curious to know which variation uses that value. I wonder which 62(letter) configuration it is?

My MPX which is a gen 2 62B serial number is 40 inch lbs. this has the 2 separate nut inserts.
The Gen 3 upper that I have built is a 20-25 inch lbs. This uses the bar and attached nut inserts. The threaded end does look smaller hence the lower torque value.

The barrel won’t determine the torque value required to grip it in it’s frame.

The main thing is never to over torque one vs another stick to the manual and what it says.

 

All three of these torque values came from the MPX owners manual. The manual does not distinguish between Gen 1,2 or 3. I know what torque is I was a mechanic for 40 years. But there is confusion within these manuals so that’s why I contacted the manufacturer.

 

I currently have a Gemtech Lunar 9 on a direct thread mount on my MPX-K. No problems with accuracy.

I'm getting a YHM R9 next week and plan on direct thread mount to my MPX-K, replacing the Lunar 9. YHM has a QD mini flash hider in LH thread and a QD adapter but I'm not going to risk buying all that and get **** accuracy.

 

I currently have a Gemtech Lunar 9 on a direct thread mount on my MPX-K. No problems with accuracy.

I'm getting a YHM R9 next week and plan on direct thread mount to my MPX-K, replacing the Lunar 9. YHM has a QD mini flash hider in LH thread and a QD adapter but I'm not going to risk buying all that and get **** accuracy.

Congrats on the new suppressor! Let us know how it does. Just curious what do you torque your barrel bolts to?

 

@kansascity45 thats a sweet setup! I was also thinking going with the carbon fiber handguard since I figured it would be more resistant to heat transfer. Glad to know the Wolfman actually fits inside the extended handguards. Apparently it wont fit inside the stock sig handguard.

 

Yeah, these Lancers are nice. Even running the 5.56 SBR's handguard REALLY hot has no effect on the carbon fibor material. Midwest alloy handle's good value too though. Here's our MI over Wolfman.

Cheers

 

A week or so ago I was able to shoot my MPX-K with a friend's Obsidian 9. I used an ILWT Navy 3-Lug adapter. The Obsidian 9 had a 1/2-28 piston and a fixed barrel spacer. I threaded it onto the 1/2-28 portion of the 3-lug adapter. I will say this, it shot better than my TiRant, still not great, but better. A different mount set up may produce better results in my particular situation. I bought my own Obsidian 9 the next day, so I will try a few more things when the transfer goes through. I really wanted to get a Wolfman, but I am not too crazy about a pistol can that cannot be user serviced.

I also looked at the Sig MODX 9. I do not care for the look of it. I also don't care for it's style of modularity. Could it become a problem with that many threaded segments tucked under a hand guard? More opportunity for it to loosen while tightening and all of that LH-RH thread problems.

 

A week or so ago I was able to shoot my MPX-K with a friend's Obsidian 9. I used an ILWT Navy 3-Lug adapter. The Obsidian 9 had a 1/2-28 piston and a fixed barrel spacer. I threaded it onto the 1/2-28 portion of the 3-lug adapter. I will say this, it shot better than my TiRant, still not great, but better. A different mount set up may produce better results in my particular situation. I bought my own Obsidian 9 the next day, so I will try a few more things when the transfer goes through. I really wanted to get a Wolfman, but I am not too crazy about a pistol can that cannot be user serviced.

I also looked at the Sig MODX 9. I do not care for the look of it. I also don't care for it's style of modularity. Could it become a problem with that many threaded segments tucked under a hand guard? More opportunity for it to loosen while tightening and all of that LH-RH thread problems.

I’m not a big fan of the ModX-9 looks either but I bought it hoping since it’s a Sig can on a Sig gun I wouldn’t have accuracy issues. It was a gamble that paid off for me. Remember I had accuracy issues with just trilugs installed. So I wanted a direct threaded can to eliminate the Trilug and since I was going to buy an extended hand guard it would cover most of the Death Star anyway😂 To be honest, the look is kinda growing on me. My favorite look is still the Wolfman and I may give that a try once my credit card cools off.

 

I am running the 4.5” Sig barrel with the SilencerCo ASR mount. Platform runs well with Hybrid but when I move to the Omega 9k I have issues cycling. I picked up some different springs to try and adjust the rate. Anyone have any issues with shorter barrel and short can.


Accuracy has never been an issue. Tack driver at 25yds.

 

Sweet gun. Giving HK a run for its money.

 

I've read the MPX can be picky with ammo. I can't see how this would make much of a difference between unsuppressed and suppressed, as long as you have an adjustable plug, but maybe. Anyone have suggestions on what reasonably priced ammo works the best?

 

I use American Eagle 147 grain and Blazer 147 grain in my MPX with Sig ModX9 and it runs perfect. I haven’t had any problems feeding my MPX. Hope this helps.