Your privacy choices

NOT TIGHT. At all. Literally just thread that bad boy in there and lightly snug it. Your OMEGA Valve will come with the solid screw installed. Use that as your reference for how tight to screw in other screws. Do not use a fancy torque wrench, do not use loctite... just don't.

No. The OMEGA Valve Mod 1 was designed around the 5.56 11.5" and 16" (but especially the 11.5") Virtus and Spear LT barrels. It will fit in the 7.62x39 barrels, and will function to some degree, though this was not the original intention. If you're running a silencer on your x39, you should be good!

It simply will not fit in the gas block with the piston in the 300 Blackout rifles, and even if it could, it will not work with the gas port geometry on this model.

The OMEGA Valve Mod. 1 is compatible with the Sig MCX Virtus, Spear LT, and Rattler LT 5.56 and 7.62x39 barrels. It is compatible with SOME Legacy barrels, but I believe that the earliest of the Legacy models have a pin that is about 1/32" shorter than the pin in the newer models, and the face of the gas block is thinner. The OMEGA Valve Mod. 1 was tested in a 9" Legacy 5.56 barrel with success, and did NOT work properly in a 16" barrel acquired for testing. A fix is in the works. If you purchased an OMEGA Valve Mod. 1 and it locks into the block but spins freely between positions, contact me, and we'll get you taken care of.

The OMEGA Valve Mod. 2-S and Mod. 2-L are designed around the 5.5" and 6.75" barrels (S-Shorter), and the 9" barrel (L-Longer). Mod. 2-L is also likely the ideal choice for 16" barrels, but this is untested. The Mod. 2 series is not guaranteed to work in Legacy (Gen. 1) MCX rifles at this time.

The Mod. 2-L may work in barrels shorter than 9 inches, but only if the user is using a silencer with very excessive back pressure. This is not guaranteed, and will also depend on ammunition.

It is not advised, and expressly discouraged to use the Mod. 2-S in barrels greater than 6.75" in length.

Honest answer and TL;DR, I simply cannot guarantee that, but probably yes. Here's why:

I'm one guy, and while I chose my test silencers very carefully to account for a wide range of different flow rates and technologies, I simply can't test them all. Especially in today's market where we've got some companies making some absolutely incredible designs that are taking full advantage of additive manufacturing and doing very weird things with gas and early shock reflections.

However, I've given you four positions to choose from, four different gas port sizes and geometries. On top of that, the OMEGA Valve is tapped for SCAR gas jet screws, available from Parker Mountain Machine. Between the four positions in the valve, the included solid screw, and the 17 screws available from PMM, you have over 70 different ways to dial this bad larry in.

Your likelihood for success in finding a combination that works to your preference of behavior is rather high.

Again, with a million and twelve different loads out there, I simply can't guarantee that.

However, I chose my test ammo carefully. I asked the community what kind of ammo they were shooting.

I have published a ton of data on this here.

As I do more testing, and as OMEGA Valve users share their experience, I will continuously update the data table.

The FN SCAR 16/17 rifle is a piston gun, similar to the MCX (I can hear the SCAR bros screaming from here). It utilizes a little screw with a hole in it seated into the gas block to vent excess gas from the block and better control the cyclic rate of the weapon. The bigger the hole, the more gas is allowed to vent.

The OMEGA Valve is tapped to accept these to vent excess gas right out the front of the valve. I highly recommend the 2.5mm hex screws sold by myself, as well as Parker Mountain Machine. PMM has been selling sizes 1.20mm-2.00mm for years, I am selling sizes 0.40-1.10. Please note that I have no idea what will happen if you install my jets into an FN SCAR, only that they will certainly thread into them.

You need the OMEGA Valve Mod. 2! There are two options to choose from. The Mod. 2-S was designed to enhance reliability in the shorter 5.5" and 6.75" barrels. The Mod. 2-L brings a philosophy similar to that of Mod. 1, working to delay the cycling of the bolt. BOTH feature patent-pending vent technology.

Both variants (Mod. 2-S and Mod. 2-L) are proven to fit in MCX Virtus, TACOPS, Rattler, Rattler LT, and Spear LT barrels. It is unlikely that they will fit in Legacy (Gen. 1) barrels.

As far as swapping them between barrels:

You may be able to get some results with Mod. 2-L in the shorter barrels, but ONLY if you are using a silencer with excessive back pressure.

It is NOT recommended to run Mod. 2-S in a 9" or longer barrel. You won't necessarily hurt anything, but the gun with certainly over-function.

Maybe. It's a feature that I really wanted to implement, but as we all know, the MCX is very gas sensitive. I have tried prototypes that straight did not even have a port in position 1 and some silencers still tried to open the bolt.

That being said, yes, achieving an "off" position in position 1 is totally possible, but it largely depends on your ammunition and the back pressure of your silencer.

If nothing else, clean your piston. You'll be removing your stock Sig valve to install the OMEGA Valve anyway, and you'll have access to it. Clean it very well and lube it up, very generously.

If you want to go even further, consider a JP Enterprises Enhanced Gas Ring. It will make your 300BLK guns more reliable.

Coming soon to a Thicc Spear near you ;)

So, a couple of things:

1. The OMEGA Valve Mod. 1 and Mod. 2 series index on the gas regulator retaining pin; this is something that was never meant to be with Sig's design. It will take some time to sort of wear the edge of that pin to allow the flanges on the valve to gracefully slip over it.

2. The OMEGA Valve isn't really meant to be swapped back and forth all willy nilly or adjusted on the fly. You should go through a proper tuning session with it for your setup, then kinda set and forget it. That being said, if you don't have either window obscured by gizmos, such as flashlights, you should be able to adjust it without removing the handguard. If one of those windows is obscured, adjustment may be difficult without removing your handguard.

3. To make it easier, just lightly press the retaining pin in just enough to allow you to more easily rotate the valve.

4. Remember to give the inside of your gas block and the OMEGA Valve a scrub with a brass brush every once in a while to clean off the excess carbon.

Well, the good news is that your action should be marginally cleaner. The bad news for you is that there is no free lunch.

In the original valve, there was always one of the two positions not in use, where gas was trying to leak outta there back into the walls of the gas block.

Now you've got three.

I would suggest hitting your OMEGA Valve with a little CLP before your first use. After that, it would be a good idea to remove the valve and hit it as well as the inside of your gas block with a brass brush or something roughly every 1,000 rounds or so to do away with any carbon buildup. If you don't, the OMEGA Valve could get sticky and harder to turn.

This is why I designed the holes surrounding the end of the valve. Insert a spent casing, bullet, or Alan wrench or something through the holes to gain some additional leverage.

I've only encountered this once, after going for weeks of live fire testing with no cleaning, and that was before I decided on going with a Hexagonal Boron Nitride coating to keep it more slick and easier to keep clean. DO NOT put the OMEGA Valve into an ultrasonic cleaner, or use any other harsh chemical system in an attempt to clean it. It could ruin the coating.

I don't know, but probably. I think I heard somewhere that the aftermarket regulators available for the SCAR will void FN's warranty, and the poor, fearful consumer in me leads me to believe Sig might have a similar mentality. This is sort of unprecedented with Sig, so they will probably say something about it at some point.

Be a man, void your warranty.

Yes and no. Honestly. The OMEGA Valve was truly designed for tuning a suppressed rifle. With the OMEGA Valve Mod. 1, I managed to pull off some successful testing with 55gr ammo, but I can't say that it'll run with anything with the same degree of confidence that I can with a silencer involved.

That being said, it will still delay the action of the rifle, it will still reduce recoil, and it will still reduce the amount of gas to your face.

As far as unsuppressed subsonic 300BLK? I personally think that's dumb, but it should cycle. Achieving bolt lock is not guaranteed.

On the OMEGA Valves themselves? Yes. If you receive one and it doesn't fit, send it back for a replacement. I will be checking every single one before they go out, but I have experienced out of tolerance gas blocks that were jacked up from Sig.

If you are buying this with the sole intention of shooting unsuppressed with it, and it doesn't work with FACTORY AMMO, send it back. There will be a $40 restocking fee.

If the valve somehow fractures or otherwise breaks, send it to me immediately for a free replacement. I don't see how it could possibly happen, but there you go.

LITERALLY ANYTHING ELSE: see the terms and conditions sections at the bottom of the page.

I know, and I'm sorry about that.

Look folks, I am 100% confident in my product. That being said, this is literally my first attempt at this sort of business ever, and I'm honestly scared of it. Not my product, but the industry itself. It's new territory for me, and I just want to keep myself and my family protected the absolute best I can. That's all. A lot of you guys have spoken to me over the last couple of years, I hope I've come off as a pretty approachable guy. Hit me up if you have concerns, please.

Not all valves print equally. They just don't. And therefore, some of them need to be turned down to spec more than others. Some will be more shiny on the proximal half, while others have a more dull appearance. Some may even have tooling marks. As a reminder, I am also just one guy with a poor man's toolset, and I did the best I could. This is not an industrial plant that is cranking out a thousand of these in a day in identical condition, please remember that. I guarantee you they're gonna function about a million times better than your beautifully machined Sig valve :)