Nemo Arms Omen Pratka .300 Win Mag AR - 14rd - 20"

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MSRP $4,199.99
Sale Price $3,999.00
Sale 5 % off


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Nemo Arms Omen Pratka .300 Win Mag AR - 14rd - 20": OMENPRATG1

Blue Collar. That is the Nemo Pratka model OMEN. The Pratka squares off directly with .308 AR rifles. This model gives you a shorter lightwight barrel and lightweight stock. This is a no frills rifle at first glance, but has all of the upgrades that an operator wants, like a match trigger, billet receivers and muzzle brake. This isn't your typical black rfle. The Pratka is harderhitting than any high-end .308 ARs and competitively priced. Shoot one for yourself and experience first-hand an advanced evolution in military-grade ARs.

Scope not included


  • 7075 Billet Aluminum Machined Receivers with Hard Black Anodize Finish
  • 20” .300 Win Mag Ultr Lightweight Fluted 416 Stainless Steel Barrel, 1:8 Twist with Nitride Finish
  • Nickel Boron Barrel Extension and Feed Ramp
  • Nickel Boron Bolt Carrier Group with Recoil Reduction System
  • Billet Machined High-strength Steel Side Charge Handle
  • Nickel Boron Bolt Release
  • Geissele SSA-E 2-stage Trigger
  • Mission First Tactical Battlelink Ultra Lightweight Minimalist Stock with NRAT Strap, Collapsible Carbine Stock with Sling Mounts
  • Hogue Overmolded Pistol Grip, Black
  • NEMO Integrated Free Floated Customizable Handguard with Hard Black Anodize Finish
  • 2 Detachable Handguard Accessory Rails with Built-in QD mounts
  • NEMO A-10 Muzzle Brake with Nitride Finish
  • 2 NEMO 14-Round Polymer Magazines
  • Carry Case
  • Collapsed Length: 40.00”
  • Weight: 9.5 pounds
Item Number OMENPRATG1
Action Semi-Auto
Operating System  
Caliber .300 Win Mag
Overall Length 40.00"
Trigger Type Geiselle SSA 2-Stage Match Trigger
Trigger Weight  
Barrel Length 20.0"
Rifling 1:8 Twist
Number of Grooves  
Weight w/o Mag 9.5 lbs.
Magazine Capacity 14rd
Magazine Type NEMO
Accessory Rail Yes
Features 2 x NEMO 14 Round Mags


The OMEN is optimized to use quality ammunition. Do not use ammunition that exceeds maximum chamber pressure recommended by SAAMI (Sporting Arms and Ammunition Manufacturers Institute). The maximum pressure is 64,000 PSI, Piezo measured.

The maximum COAL (Cartridge Over All Length) that can be used in the OMEN is up to 3.50 inches. You must check your chamber dimensions before loading ammunition beyond SAAMI length.

There are many different manufacturers of ammunition and loads for the .300 Win. Different ammunition, bullet weights and powder combinations will cause varying degrees of accuracy and performance of the rifle.

Lighter loads, and bullet weights may cause the rifle to not lock the bolt back on the last rounds. Lighter loads can be hot loads and could cause cycling issues, pierced or blown primers.

Really hot loads or heavy bullet weights may cause overgassing, pierced or blown primers.

Soft primers, or loose primers may cause blown or "dropped" or pierced or blown primers. The OMEN is designed to perform the best with military-grade hard primers.

Ammunition not to be used in the OMEN:

  • 150gr Ammunition
  • Hornady Superformance
  • Federal Fusion
  • Any ammunition that shows excessive pressure signs such as flattened primers, blown primers, pierced primers


If your ammunition is blowing or piercing primers, discontinue shooting. Completely fieldstrip and clean rifle. Replace firing pin if you have pierced primers. Use different ammunition.

Does not include scope.

Regular price: $4,199.99 $3,999.00 Available from: Marksman Armory Condition: New Out of stock