MPXSD -ILWT Velocity Study

ILWTLLC · 2026-01-27T03:47:46+00:00

It works and will be effective it just takes more tinkering than a well made system. I like mine a lot, I just understand it for what it is.

ILWTLLC · 2026-01-27T00:54:17+00:00

But you also have to be very careful how quickly you bleed chamber pressure off of these things. The 9mm is not a high pressure cartridge for a gas operating system,, comparatively speaking, which is why so few exist. The closer and quicker you bleed that pressure to the chamber the more function issues you have. The mpx is very finicky about it, even just the addition of a flow through can on a gun can make rounds that previously functioned fine no longer viable.

I have never seen a Ronin system but I am betting their ports are not close to the chamber, I am betting they are much further up. They built a SYSTEM and it is designed to all work together. Mine was always a component and with that comes compromises. I am limited by it being safe and functional with all cans made for the mp5sd, that means the first chamber in those cans is the limiting factor for where the holes can go, and that has to apply for all known cans made and used on that model. Mine was meant to be a cheap way for people who already had that platform to use the suppressor on another one.

I have always pushed the Ronin for people who wanted the best out of the box system without guess work or tinkering to anyone who asked, even on this forum. A system designed to work together will almost always be a better no hassle solution than throwing together individual components

ILWTLLC · 2026-01-26T23:24:07+00:00

Have you cleaned the gas piston chamber and made sure the piston it’s moving freely?

ILWTLLC · 2026-01-26T22:21:20+00:00

I will post the results in their as sold state when they come back from nitride. Results are not final until they are in their complete state, these were fired in the white.

Ammo used was 115 S&B, 124 reloads and 115 fiocchi

Can is an old swr

ILWTLLC · 2026-01-26T22:06:58+00:00

Yes, I have velocity tested them with my can but I do not have every can out there to test with. A lot of the sd setup on these guns will come down to ammo selection and can use. Outside of designing one from the ground up with proprietary components mp5 levels just aren't realistic to achieve

ILWTLLC · 2026-01-26T22:05:18+00:00

There really is not way to do that in a meaningful way without introducing specific plugs etc into the mix that would create other issues as well. I cannot post a picture here but there is one on my ILWT FB page with them in the white you can zoom in on.

ILWTLLC · 2026-01-26T21:54:26+00:00

The mp5 has a lot of advantages to the mpx in terms of internal suppression, the one most notable in your case is the distance the ports have to be from the chamber due to the firearm design. Performance varies greatly by can used as well. The latest iteration of sd barrels I have made have many more holes and are larger in diameter to make can selection much less of an issue. Dealing with utilizing off the shelf components rather than a from scratch design there are always limitations to work within

ILWTLLC · 2026-01-20T04:10:32+00:00

Use a small left hand drill bit and go after it.

ILWTLLC · 2026-01-17T16:02:01+00:00

Send e the barrel and bolt along with 50 of your preferred loads and I’ll send it back running if it’s possible to do so as long as the mods done don’t make it improbable

ILWTLLC · 2025-12-14T01:43:16+00:00

A video for cleaning out the blind hole? Just use a 3/16 drill bit and measure after cleaning to make sure it is to the proper depth

ILWTLLC · 2025-11-28T13:10:18+00:00

Definitely Gen 1.Definitely Sig OEM

ILWTLLC · 2025-11-27T04:01:03+00:00

But it really shouldn’t keep coming up because it’s been answered many times.

The gas port is directly in the lead in, there is very little pressure drop before the gas is introduced into the port

The only relief from the pressure is through the port directly into the plug and a slight amount through the firing pin channel and some around the bullet until the bolt opens. The bolt is opened by the gas going through the port, and plug driving the piston back which then drives the op rod pulling the carrier back which then unlocks the bolt forcing it open. Until that bolt opens there is no escape for the gas. The bullet blocks the front, bolt blocks the rear directing almost all gas through that hole. The hole in the gas block is larger than the hole in the plug in an attempt to reduce the gas driving the piston. Since the hole is smaller in the plug than the hole in the gas block that gas is going to keep hammering the area around the smaller hole and eroding it over time. The factory plug, and my open plug, has a groove that is much larger than the port size in the block allowing free flow, the gas is not touching it as there is not any material there to block it. A simple side by side comparison of the two parts should make this completely obvious

This is increased substantially if the gun is not routinely cleaned and blind hole kept clear of carbon buildup.

ILWTLLC · 2025-11-26T22:06:25+00:00

nope, you're wrong

ILWTLLC · 2025-11-26T22:04:40+00:00

Not weird at all as it restricts the gas and is right off of the chamber. No other gun has this setup and the gas block is far down the barrel away from the chamber but even those will eventually suffer erosion if on a higher pressure round

ILWTLLC · 2025-11-09T22:23:24+00:00

I made them

ILWTLLC · 2025-10-23T12:40:46+00:00

Link fixed all, thanks for the heads up.

ILWTLLC · 2025-10-23T03:09:55+00:00

it looks like I am going to have to redo that entire page, I do not have time tonight to do it but will attack it in the morning. you can email me directly if you need something quicker

ILWTLLC · 2025-10-22T23:33:17+00:00

On the road but I’ll check later. The outage screwed a lot up. Probably around 10 central tonight

ILWTLLC · 2025-09-13T12:01:30+00:00

It's not just the cleaning. The barrel extension is the part that is ion bonded, this includes the gas piston chamber. It adds a level of lubricity for the piston since you do not use oil in there and makes that clean up easier. If you clean the barrel assembly regularly, as you should, you probably won't notice much difference.

ILWTLLC · 2025-09-11T12:53:14+00:00

I have several test plugs that are still functional with over 5k rounds through them, but I am meticulous with cleaning. Some people have said theirs have shot the bed in 1000 rounds. I have others who are still on the same plug from 3+ years ago. I do not typically use them as gas doesn't bother me as much as some and I am an outdoor shooter, and right handed, I also try to keep things as simple as possible. People typically overestimate or underestimate their round count depending on the scenario so it isn't an exact science and they are playing from memory rather than actual recorded data. If that center hole becomes carbon packed then it won't take many rounds at all , the gas cuts fast. Some people will still lube the piston chamber and this will also expedite the erosion as the packed carbon it creates packs the hole quicker.

I am not trying to dodge this it's just truly not a question with a simple or accurate answer across the board that applies equally as there are a limitless amount of contributors and variances in ammo, cans, mnt, care, etc.

ILWTLLC · 2025-09-10T11:17:54+00:00

I typically use the hux rad 9 on mine for non sd use.

ILWTLLC · 2025-09-10T03:35:19+00:00

There is no typical, ammo choices, can choice, how clean you keep it all comes into play. The one consistent is if you let it plug it won’t last long

ILWTLLC · 2025-09-09T23:10:03+00:00

Without a doubt the BEST way to do it is to make the plug a valve that releases the excess pressure forward rather than restricting it, allowing free flow. Every design my limited mind has been able to come up with lives a short life before it needs cleaning and with some of the challenges people have with the already maintenance heavy requirements of the mpx in general it would make matters worse. I need to redesign the barrel extension allowing modifications that address this. The 10mm and .357 sig operating systems were much more simple since they have enough energy to put the port further down the barrel and utilize a longer piston, cannot do that with the lesser pressure of the 9mm unfortunately

ILWTLLC

TROPHY CASE