BACKORDER OMEGA Valve Mod. 1 (5.56)
BACKORDER OMEGA Valve Mod. 1 (5.56)
18 in stock
Couldn't load pickup availability
Patent Pending
IF THE WORD "BACKORDER" IS PRESENT IN THE PRODUCT NAME, THESE ITEMS ARE NOT READY TO SHIP. THE STOCK COUNTER INDICATES THE QUANTITY AVAILABLE TO BE RESERVED. CURRENT LEAD TIME AS OF 11/12/25 IS APPROXIMATELY THREE WEEKS.
Don’t feel like waiting? Check my dear friends at Revival Defense. They only do ready-to-ship, and they're quick!
Current orders awaiting fulfillment (prior to 11/12/25): They're at coating!
View data here. This table can serve simply to give you an idea of some potential starting points.
USPS Disclaimer: I am hereby advising you to choose UPS. Do not harass me if USPS is slow!
"Holy shit this feels like cheating." Music to my ears.
The OMEGA Valve is the first tunable gas valve for the Sig Sauer MCX. It is made from 17-4 stainless steel via additive DMLS manufacturing, and is coated in an advanced hexagonal boron nitride coating.
It does three things:
- Instead of indexing on a ball detent within the gas block, it indexes on the gas valve retaining pin, allowing for four gas positions as opposed to the original two.
- It utilizes extended gas flow paths to delay entry of the gas into the expansion chamber of the Valve, slowing down the cycling of the rifle.
- It utilizes Parker Mountain Machine SCAR gas jet screws, allowing the user to vent excess gas out of the front of the OMEGA Valve. Also available are my own Micro Jet Screws to allow even finer tuning of your system!
When dialed in correctly, the OMEGA Valve will transform your experience with the Sig MCX. You will experience a softer recoil impulse, a less severe at-ear sound signature (when shooting with a silencer), and marginally reduced exposure to toxic gas, regardless of what ammunition and silencer you choose to use. Please note that the OMEGA Valve was designed to tune suppressed performance. Satisfactory results can be obtained in the unsuppressed state, but this was never the goal. Simply put: exceedingly under-powered ammunition may not function properly without the use of the silencer.
With your order, you will receive:
- (1) OMEGA Valve Mod. 1
- (1) Solid Set Screw (already installed)
- (1) 2.5mm wrench
This model has been tested to work with the Sig Sauer MCX Virtus, and Spear LT line of 5.56 rifles. It also works to some degree in 7.62x39 barrels, but it was truly optimized for 5.56, and so it is marked "5.56." If you are running a silencer with your 7.62x39, you should be fine.
It has been tested to work in SOME Legacy rifles, likely close to when Sig made the transition to the Virtus era. If you have a Gen. 1 (AKA "Legacy") MCX, I would look at the "Legacy" line of OMEGA Valves. It will not work in the 300BLK rifles. See the FAQ for additional information regarding compatibility and adjustment.
Be advised: not all valves print equally, and some must be sanded and/or turned down to fit into spec and may have a more "polished" finish than others.
Disclaimer: Sig Sauer® and MCX® are trademarks of Sig Sauer, Inc. J. Bennett Designs, LLC is not affiliated with or endorsed by Sig Sauer, Inc. OMEGA Valve is an independent product compatible with the Sig Sauer® MCX® platform.
We have data available to be viewed here.
Share
Export Compliance Notice: Export of this product is controlled under the U.S. Department of Commerce, Bureau of Industry and Security (BIS), pursuant to the Export Administration Regulations (EAR), Title 15, C.F.R., Parts 730–774. J. Bennett Designs, LLC does not authorize any dealer, distributor, or other third party to export this commodity without prior written authorization. Warranty service and post-sales support will not be provided for unauthorized international exports.
Was running a 556 Polonium with an 11.5 Spear LT. was extremely punchy and overgassed to all hell. Threw the omega valve in there and it runs like a dream.
Setting 4 is perfect for Lake City M855 and M193. Setting 3 is great for the downloaded 55gr offerings that are so common today from companies like PMC and Fiocchi.
Adjustments are quick so you can make anything work. Thanks so much for making a great product!
Product is of outstanding quality and works as advertised. Makes the Spear LT a much more desirable platform and in my opinion, a superior suppressor host to a DI AR-15. Jake is also a stand up guy, he deserves your trust and support.
I finally got around to running a couple of different rounds through the Mcx spear LT 11.5” 7.65x39 suppressed with the SilencerCo Omega 300. Here are my results:
Hornady Black 7.62x39 123gr SST at 100 yards on gas setting 3, full lock back and successful feed. 5 groups at .89” MOA, Also the cleanest burning round I’ve had to date.
Norma R&T 7.62x39 123gr FMJ at 100 yards on gas setting 3, full lock back and successful feed. 5 groups at 1.01” MOA.
Conclusion, this one little upgrade made me love the Mcx spear lt rather than before I didn’t want to pull it out of the safe anymore. Runs flawlessly and I can finally say if it was my only rifle I’d trust it with my life.
fixed my supresson issue. Position 4 is a bit gassy though
On a 11.5" 5.56 Spear LT with the solid jet, Setting 4 felt about as aggressive as the factory regulator on the "-" setting, ejecting at 3:00. I couldn't get any of the commercial ammo to run on Setting 3 unsuppressed (Federal AE 223 55gr FMJ, IMI M193, Norma SS109/M855, or IMI 77gr Razor Core) which was surprising as the data table on Jake's site showed a few people able to run on setting 3 with the solid screw. With a flow can suppressor (Specifically the SIG SLX556-QD/NG556-QD and the NGSW suppressor aka SLX-MG/NG68SPEAR-QD) it ran on Setting 3 without any issues and was ejecting at about 3:00 (versus 1:00 with the factory regulator). My next plan is to try different gas jets to tame the unsuppressed config in setting 4 and to see if it will still work suppressed in setting 3.