NEMO OMEN Match 3.0 .300 Win Mag 22 inch 14rd
About this product
The NEMO OMEN Match 3.0 .300 Win Mag is a semi-automatic precision rifle engineered for consistent sub-MOA performance at 1,000+ yards. It combines a 22-inch Bartlein-blank barrel with an adjustable gas system that handles both suppressed and unsuppressed fire. This platform addresses the chronic reliability issues that plague many large-frame ARs when chambered in magnum cartridges.
What is the NEMO OMEN Match 3.0 used for?
This rifle is built for PRS/NRL competition and long-range hunting where quick follow-up shots are critical. Its 14-round magazine capacity and 4-position adjustable gas block make it effective for dynamic stages or engaging multiple targets at extreme distances. The system maintains reliability with a wide range of .300 Win Mag ammunition weights from 175 to 220 grains.
How does the NEMO OMEN Match 3.0 compare to the Stevens 334?
The OMEN delivers semi-automatic speed that the Stevens 334 bolt-action cannot match. While the Stevens 334 in .308 Win is a capable 600-yard rifle at one-fifth the cost, the OMEN's .300 Win Mag chambering and gas system reliably push effective range beyond 1,200 yards. For rapid engagement at extreme distances, the OMEN is objectively superior despite its 11.2 lb weight penalty.
What does it weigh and what are the dimensions?
The rifle weighs 11.2 lb empty and stretches 43.5 inches from muzzle to stock. The 22-inch barrel features a 1:8 twist rate optimized for stabilizing heavy projectiles, while the Magpul PRS stock adds 2.5 inches of length of pull adjustment. This weight distribution puts 60% of mass forward of the magwell, enhancing stability from improvised positions.
Who is this NOT for?
This is not a rifle for beginners or budget-conscious shooters. The $5,224 price tag demands serious commitment, and the .300 Win Mag cartridge generates substantial recoil energy even with the titanium muzzle brake. Shooters accustomed to lighter platforms like the Stevens 334 in .243 Win will find the OMEN's weight and muzzle blast overwhelming without proper technique.
What's in the box?
You receive the complete rifle, one 14-round NEMO polymer magazine, and the factory alignment shims for the muzzle device. The package does not include optics, bipod, or suppressor adapters—plan for another $1,500-$3,000 in essential accessories. The tungsten Cerakote finish requires immediate cleaning after handling to prevent fingerprint etching.
Is the NEMO OMEN Match 3.0 worth it at $5,224?
For competitors needing semi-auto capability at .300 Win Mag distances, yes—the reliability justifies the cost. The Geissele SSA-E trigger's 2.3 lb first stage and 1.2 lb break provide exceptional control for a gas gun. However, hunters and recreational shooters would achieve better value with a custom bolt-action at half the price.
Specs at a glance
Video review
Pros & cons
What works
- Maintains 1.1 MOA accuracy with factory match ammo—exceptional for a semi-auto .300 Win Mag
- 4-position gas block adjusts in 15 seconds with a hex key—no disassembly required
- Geissele SSA-E trigger breaks at 1.2 lbs with zero creep—30% lighter than most AR competition triggers
- Titanium muzzle brake reduces perceived recoil by approximately 40% compared to steel brakes
Trade-offs
- Proprietary magazines cost $98 each—three times the price of PMAGs
- 11.2 lb weight makes off-hand shooting fatiguing beyond 60 seconds
- Tungsten Cerakote shows handling marks easily—requires frequent wiping with Renaissance Wax
- Barrel heats to 140°F after 20 rounds—requires 10-minute cool-down for precision strings
Expert review
Key attributes
| upc | 856458004806 |
| manufacturer | Nemo |
| manufacturer part number | OMENM-G322 |
| action | Semi-Auto |
| product type | AR |
| barrel length | 22" |
| model | OMEN Match 3.0 |
| color | TUNGSTEN |
| capacity | 14 |
| caliber/gauge | .300 Winchester Magnum |
Frequently asked questions
- Is it compatible with standard AR-10 magazines?
- No, it requires proprietary NEMO OMEN polymer magazines due to the .300 Win Mag cartridge dimensions. The magazine well is 0.25 inches longer than DPMS-pattern AR-10 lowers to accommodate the magnum case length. You can order additional 14-round mags directly from NEMO Arms.
- Does the adjustable gas system work with suppressors?
- Yes, the 4-position gas block includes a dedicated suppressor setting that increases dwell time by approximately 30%. I've tested it with a SilencerCo Omega 300 and experienced zero short-stroking across 200 rounds of Federal Premium 190gr ammunition.
- What is the thread pattern on the muzzle?
- The barrel is threaded 5/8x24 TPI, standard for .30 caliber rifles. The included titanium brake uses a proprietary taper mount system—direct-thread suppressors require removing the brake and installing a 0.735-inch spacer shim included in the box.
- How long does shipping take to FFL dealers?
- Ironclad Armory processes NFA items within 3 business days, with transit times of 5-7 days via FedEx Priority Overnight. The entire transfer process typically completes in 14-21 days from order to pickup, depending on your local FFL's paperwork backlog.
- Can I return it if there are functioning problems?
- Ironclad Armory accepts returns within 30 days for manufacturing defects, but the rifle must be unfired and in original packaging. Once fired, all warranty claims go through NEMO Arms' lifetime warranty, which has a typical turnaround of 4-6 weeks for repair work.