Primary Weapons Systems MK109 MOD 2-M Upper Receiver Assembly in .300 Blackout


Experience superior performance with the PWS MK109 MOD 2-M upper in .300 Blackout. Featuring a long-stroke piston system for reduced recoil and enhanced reliability, this premium upper delivers exceptional accuracy and durability for tactical applications.

$1,399.95

Premium Performance: PWS MK109 MOD 2-M Upper in .300 Blackout

Elevate your AR platform with the Primary Weapons Systems MK109 MOD 2-M upper receiver assembly, engineered for exceptional reliability and precision in .300 Blackout caliber. Designed for shooters who demand top-tier performance in tactical and hunting scenarios, this upper combines innovative engineering with robust construction to deliver consistent results under demanding conditions.

Advanced Long-Stroke Piston System

The heart of the MK109 MOD 2-M is its proprietary long-stroke piston operating system, which significantly reduces felt recoil and minimizes carbon buildup in the receiver. Unlike direct impingement systems that channel hot gases back into the action, this piston-driven design keeps your rifle cleaner and cooler, enhancing reliability during extended shooting sessions. This system also contributes to smoother operation and reduced maintenance requirements.

Optimized for .300 Blackout Performance

Specifically configured for the .300 AAC Blackout cartridge, this upper delivers optimal ballistics whether you’re using supersonic or subsonic ammunition. The 9-inch cold hammer-forged barrel provides excellent accuracy while maintaining a compact profile ideal for suppressed applications. The .300 Blackout round offers superior terminal performance compared to 5.56mm in shorter barrels, making this upper perfect for home defense, hunting medium game, or tactical operations.

Enhanced Durability Features

  • Proprietary Bolt Carrier Group: The enhanced bolt features improved extractor geometry and a robust ejector for reliable cycling with various ammunition types
  • Rigid Handguard: The free-float M-LOK compatible handguard provides a solid platform for accessories while reducing weight
  • Enhanced Gas System: Adjustable gas block allows fine-tuning for different ammunition types and suppressor use
  • Premium Materials: Constructed from 7075-T6 aluminum with Type III hardcoat anodizing for maximum durability

Why Choose Texas Gun Store?

At Texas Gun Store, we’re committed to providing firearms enthusiasts with premium products and expert guidance. Our team has extensive experience with the PWS product line and can help you select the perfect components for your build. We offer competitive pricing, fast shipping, and exceptional customer service to ensure your complete satisfaction. Visit our store to explore our full selection of AR components and accessories.

FAQ: Why Buy From Texas Gun Store?

  • Expert Knowledge: Our staff includes experienced shooters who understand these products firsthand
  • Quality Assurance: We thoroughly inspect all products before shipping to ensure they meet our high standards
  • Customer Support: We provide comprehensive after-sale support and are available to answer your technical questions
  • Secure Transactions: Your purchases are protected with industry-leading security measures
  • Fast Shipping: Most orders ship within 24 hours of payment verification

Complete your AR build with confidence using the PWS MK109 MOD 2-M upper. Whether you’re constructing a dedicated home defense weapon, a hunting rifle, or a tactical platform, this upper delivers the performance and reliability that serious shooters demand. Pair it with your favorite lower receiver and experience the difference that quality engineering makes.

Manufacturer Primary Weapons Systems (PWS)
Model MK109 MOD 2-M
Caliber .300 Blackout (.300 AAC Blackout)
Barrel Length 9 inches
Barrel Material 4150 Chrome Moly Vanadium Steel
Barrel Finish QPQ Corrosion Resistant
Barrel Profile Government
Twist Rate 1:8 inches
Gas System Long-Stroke Piston, Adjustable
Handguard M-LOK Compatible, Free-Float
Handguard Length Approximately 8 inches
Upper Receiver Material 7075-T6 Aluminum
Finish Type III Hardcoat Anodized
Bolt Carrier Group Enhanced PWS Design, Chrome Lined
Muzzle Thread 5/8×24 TPI
Weight (Approximate) 3.5 lbs (without BCG)
Overall Length Approximately 20 inches
SKU: 2M109UB01-1F Category:

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