Buy MK109 MOD 1-M Upper 300BLK – Kodiak Brown
$1,209.00
The MK109 MOD 1-M Pistol is equipped with the renowned PWS PWS long-stroke piston system, maintaining the reliability that PWS owners have come to trust. This line features a free-float MLOK handguard, forward assist controls, and a design closer to mil-spec standards, catering to civilians and Law Enforcement alike. With fully forged upper and lower receivers, the MK1 MOD 1-M offers a straightforward solution for those seeking a high-value option that delivers unwavering performance in any situation.
What PWS aficionados refer to as the “ideal rifle”, the MK109 MOD 1-M is perfect for shooters looking for a weapon with endless uses. Maintaining the shortest barrel length recommended for suppressed use, this compact rifle is one of the most popular from LE to heli-hunting.
Buy PWS MK109 MOD 1-M Upper .300 BLK Kodiak Brown – 9.75″ Long Stroke Piston Complete Upper Receiver
Upgrade your AR-15 or pistol build with the striking PWS MK109 MOD 1-M Upper .300 BLK Kodiak Brown from Primary Weapons Systems. This limited-run complete upper combines PWS’s proven long-stroke piston system with a premium full Kodiak Brown anodized finish for unmatched style and performance.
Designed specifically for .300 Blackout, the MK109 MOD 1-M excels with both supersonic and subsonic ammunition. Its compact 9.75″ barrel and lightweight design (approximately 3.5 lbs) make it ideal for short-barreled rifles (SBRs), pistols, or suppressed setups where maneuverability and reliability are critical.
The heart of this upper is PWS’s renowned long-stroke piston operating system with a 3-position adjustable gas block. This system keeps carbon and fouling out of the receiver, reduces gas blowback to the face, and ensures ultra-reliable cycling — even when suppressed. Shooters appreciate the soft recoil impulse and consistent performance in adverse conditions.
Key Features & Specifications
- Caliber: .300 Blackout (.300 BLK) – Optimized for super and subsonic ammo
- Barrel: 9.75″ 41V50 CMV steel barrel, 1:8 twist rate (or 1:6 in select configs), threaded 5/8×24
- Operating System: PWS Long Stroke Piston with 3-setting adjustable gas block (pistol-length gas system)
- Handguard: Free-float M-LOK handguard (approx. 8.9″ length) for lightweight accessory mounting
- Upper Receiver: Forged 7075-T6 aluminum with integrated forward assist, full Kodiak Brown anodized finish
- Muzzle Device: PWS FRC 2-port compensator or Triad 30 (suppressor-ready)
- Charging Handle: Includes premium Radian Raptor ambidextrous charging handle
- Weight: Approximately 3.5 lbs – Extremely lightweight for its class
- Accuracy: Sub-MOA capable with quality match-grade .300 BLK ammunition
The full Kodiak Brown anodized finish on both the upper receiver and handguard gives this upper a unique, tactical aesthetic that stands out from standard black builds while maintaining full durability and corrosion resistance.
Why Choose the PWS MK109 MOD 1-M .300 BLK Kodiak Brown Upper?
- Superior reliability and cleaner operation than direct impingement systems
- Excellent suppressed performance with minimal gas to the face
- Lightweight and compact design perfect for home defense, CQB, or backpacking builds
- Versatile M-LOK handguard for lights, lasers, grips, and optics
- Proven PWS piston system trusted by professionals and enthusiasts alike
Whether you’re building a suppressed .300 BLK pistol, a short-barreled rifle, or a premium tactical setup, the MK109 MOD 1-M Kodiak Brown upper delivers exceptional accuracy, soft shooting, and low-maintenance reliability.
Ready to add some color and performance to your build? Add the PWS MK109 MOD 1-M Upper .300 BLK Kodiak Brown to your cart today for competitive pricing, expert support, and fast shipping.
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