Primary Weapons Systems MK111 Mod 1-M Features
The MK111 Mod 1-M Upper Receiver utilizes the PWS Long Stroke Piston System with a 3-setting adjustable gas regulator, providing increased reliability and reduced maintenance compared to traditional direct impingement systems. The upper receiver is constructed from T6 7075 forged aluminum, ensuring strength and longevity.
The 11.85″ barrel, chambered in 7.62×39, is optimized for a wide range of shooting applications. The carbine-length gas system ensures smooth operation and reliable cycling. The PWS M-Lok 11.05″ handguard offers ample space for accessory mounting while maintaining a slim profile. Measuring 1.7″ in width and 2.25″ in height, the handguard provides a comfortable and ergonomic grip. Additionally, the included Radian Raptor Ambidextrous Charging Handle ensures ease of use for both right- and left-handed shooters.
Primary Weapons Systems MK111 Mod 1-M Specifications
- Brand: Primary Weapons Systems
- Model: MK111 Mod 1-M Upper Receiver
- Caliber: 7.62×39
- Barrel Length: 11.85″
- Gas System Length: Carbine
- Barrel Twist Rate: 1:8
- Muzzle Velocity: 2741 fps
- Muzzle Device: PWS Triad 556
- Operating System: PWS Long Stroke Piston System with 3-Setting Adjustable Gas Regulator
- Upper Receiver: PWS Proprietary Piston Upper, T6 7075 Forged, Anodized
- Handguard: PWS M-Lok 11.05″ Handguard (1.7″ width, 2.25″ height)
- Finish: Anodized Black
- Charging Handle: Radian Raptor Ambidextrous Charging Handle
- Compatibility: Fits AR-15
| Barrel Length | 11.8 |
|---|---|
| Caliber | 7.62 X 39 |
| Condition | New in Box |
| Finish Per Color | Black |
| Manufacturer | Primary Weapons Systems |
| Manufacturer Part Number | 18-M111UF0B |
| Model | MK111 Mod 1-M Upper |
| Type | Uppers |
| UPC | 811154030429 |
Frequently Asked Questions About This Product
Why buy Primary Weapons Systems MK111 Mod 1-M Upper 7.62 X 39 11.8" Barrel from Miami Shooters Supply?
We’re a trusted firearms dealer offering fast shipping, competitive pricing, and 100% compliance with U.S. federal firearm laws. All orders ship from our licensed facility with full tracking and expert customer service.
Where can I buy Primary Weapons Systems MK111 Mod 1-M Upper 7.62 X 39 11.8" Barrel?
You can purchase this item directly on our website and have it shipped to your local FFL dealer. You can also visit us in-store in Miami, Florida.
Is Primary Weapons Systems MK111 Mod 1-M Upper 7.62 X 39 11.8" Barrel available now?
Availability is shown live on this page. If the “Add to Cart” button is visible, this item is currently in stock and ready to ship.
What category does this product belong to?
This product is listed under: RIFLES, Uppers.
What tags or features does this product have?
Key features and tags for this product include: RIFLES, Uppers.
Is this product legal in my state?
It is your responsibility to ensure this item is legal in your state or locality. We ship only to valid FFL dealers in compliance with U.S. laws. Always check your local regulations.
FFL Transfer & Firearms Laws for Primary Weapons Systems MK111 Mod 1-M Upper 7.62 X 39 11.8" Barrel
All firearms, including the Primary Weapons Systems MK111 Mod 1-M Upper 7.62 X 39 11.8" Barrel, must be shipped to a licensed Federal Firearms License (FFL) dealer. You will be required to complete a background check and any necessary paperwork before taking possession.
How It Works
- Place your order online.
- Provide your preferred FFL dealer information.
- We ship the firearm directly to your FFL.
- You complete the background check and pickup at the FFL.
Legal Compliance
We comply with all federal and state firearm laws. It is your responsibility to ensure the Primary Weapons Systems MK111 Mod 1-M Upper 7.62 X 39 11.8" Barrel is legal in your state. Some states may have restrictions on certain firearm models or features.
Helpful Resources
Need assistance? Contact our Miami store for help with FFL transfers and firearm compliance.
