NEMO Arms
NEMO Arms builds precision semi-automatic rifles engineered around big magnum calibers most AR-pattern rifles can’t handle, most notably the .300 Winchester Magnum in its OMEN series. The lineup also includes the lighter 6mm ARC-chambered Battle-Lite and the .308 Winchester/6.5 Creedmoor Executive Order line, giving long-range shooters a semi-auto alternative to a bolt gun without giving up magnum-class ballistics. Impact Guns carries NEMO’s OMEN, Battle-Lite, and Executive Order rifles along with factory magazines and component ammunition.
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NEMO OMEN: Semi-Auto .300 Winchester Magnum Precision Rifles
The OMEN line (Recon, Match, and Watchman configurations) is built around the .300 Winchester Magnum — a cartridge most gas-operated semi-autos struggle to cycle reliably. NEMO’s AR-10-pattern design is purpose-built to run the magnum round, giving long-range shooters faster follow-up shots than a bolt-action rifle in the same caliber without sacrificing the reach .300 Win Mag is chosen for in the first place.
NEMO Battle-Lite: Lightweight 6mm ARC and .22 ARC Rifles
The Battle-Lite trades magnum power for a lighter, faster-handling rifle chambered in 6mm ARC or .22 ARC — cartridges built for flat trajectories and low recoil at extended range. It’s the pick for shooters prioritizing weight and handling over the OMEN’s raw magnum reach.
NEMO Executive Order: .308 Win and 6.5 Creedmoor Precision Rifles
The Executive Order line (including a Carbon-barreled variant) chambers the more traditional .308 Winchester and 6.5 Creedmoor, both easier calibers to feed and shoot than .300 Win Mag while still covering typical hunting and long-range precision distances.
Why Choose a Semi-Auto Magnum Rifle Over a Bolt Gun?
A bolt-action rifle in .300 Win Mag remains the standard for maximum accuracy, but a semi-auto platform like the OMEN lets a shooter stay on target for faster corrections and follow-up shots — valuable in a hunting situation where a first shot doesn’t fully connect, or in a competitive precision-rifle course against the clock.
NEMO Magazines and Ammunition
Impact Guns also carries factory NEMO OMEN magazines in .300 Winchester Magnum, along with NEMO’s Foundation Series component ammunition for reloaders and high-volume shooters.
Frequently Asked Questions
Can the NEMO OMEN really cycle .300 Winchester Magnum reliably?
Yes — the OMEN’s AR-10-pattern gas system is specifically engineered around the .300 Win Mag cartridge, unlike a general-purpose AR-10 rebarreled for the round.
What’s the difference between the OMEN and Executive Order lines?
The OMEN is built around magnum calibers (.300 Win Mag) for maximum long-range reach; the Executive Order chambers more common .308 Win and 6.5 Creedmoor for easier-shooting precision performance.
See Also: AR-10 Rifles • .300 Win Mag Ammo