Primary Weapons Systems152742935
Pws Mk116 Mod 1-M Upper 16.1" Blk$1,175.84
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Availability: In Stock
The Primary Weapons Systems MK116 Mod 2-M is a complete rifle upper receiver built around PWS's proven long-stroke piston platform—a no-compromise choice for shooters who demand reliability and shootability in a mid-length package. This is a true piston-driven upper, not the direct-impingement designs that dominate the market, which means cooler, cleaner operation and the inherent reliability that comes with the system. At 16.1 inches, the barrel length strikes a practical balance between velocity, maneuverability, and sight radius, making it equally at home on the range, in competition, or in a duty-grade build.
The upper receiver itself is fully forged from T6 7075 aluminum and hard-anodized for durability—you can see and feel the difference from MIM'd or cast alternatives. PWS engineered the MK116 Mod 2-M without a forward assist, paired with a flared magazine well and integrated trigger guard, choices that reflect modern rifle design and shooter preference. Charging is handled by a Radian Raptor ambidextrous charging handle, making the upper equally practical for right or left-handed shooters. The handguard system uses PWS's PicLok technology, which lets you mount both Picatinny rail and M-LOK accessories without proprietary adapters—genuine flexibility for optics, lights, and grips.
Topped with a PWS FSC 556 flash hider and chambered in 5.56 NATO with a .223 Wylde barrel, the MK116 is a versatile upper that pairs with any standard AR-15 lower receiver. The 1:8 twist rate and 2,980 fps velocity give you the ballistic flexibility to run anything from 55-grain varmint loads to heavier match and duty rounds. If you're building a precision carbine, a lightweight hunting rifle, or upgrading to a quality piston-driven platform, this upper delivers the engineering and function that sets PWS apart.
| Barrel Length | 16.1 inches |
| Barrel Twist Rate | 1:8 |
| Muzzle Velocity | 2,980 fps |
| Chambering | 5.56 NATO / .223 Wylde |
| Upper Receiver Material | T6 7075 Forged Aluminum, Hard-Anodized |
| Handguard | PWS PicLok, 15.05 inches |
| Charging Handle | Radian Raptor Ambidextrous |
| Muzzle Device | PWS FSC 556 |
| Operating System | PWS Long-Stroke Piston |
The MK116 Mod 2-M is a standard AR-15 upper receiver and will pair with any mil-spec AR-15 lower receiver. You're not locked into a proprietary platform.
Yes. The PWS PicLok system is designed to accept both Picatinny rail and M-LOK attachments directly, without requiring separate adapters or rail sections.
The forward assist is omitted by design. Many experienced shooters prefer the cleaner profile and find it unnecessary on a properly tuned, reliable piston-driven upper. If you prefer one, you'll want to confirm compatibility with your chosen lower receiver.
Yes. The .223 Wylde barrel, 1:8 twist, and quality forged construction make this upper capable across precision rifle, hunting, and competition applications. The piston system and integrated features prioritize reliability and shootability.
SKU: 152747137 • Width: 4in • Height: 4in • Depth: 32.75in • Weight: 5.4oz
Availability: In Stock
The Primary Weapons Systems MK116 Mod 2-M is a complete rifle upper receiver built around PWS's proven long-stroke piston platform—a no-compromise choice for shooters who demand reliability and shootability in a mid-length package. This is a true piston-driven upper, not the direct-impingement designs that dominate the market, which means cooler, cleaner operation and the inherent reliability that comes with the system. At 16.1 inches, the barrel length strikes a practical balance between velocity, maneuverability, and sight radius, making it equally at home on the range, in competition, or in a duty-grade build.
The upper receiver itself is fully forged from T6 7075 aluminum and hard-anodized for durability—you can see and feel the difference from MIM'd or cast alternatives. PWS engineered the MK116 Mod 2-M without a forward assist, paired with a flared magazine well and integrated trigger guard, choices that reflect modern rifle design and shooter preference. Charging is handled by a Radian Raptor ambidextrous charging handle, making the upper equally practical for right or left-handed shooters. The handguard system uses PWS's PicLok technology, which lets you mount both Picatinny rail and M-LOK accessories without proprietary adapters—genuine flexibility for optics, lights, and grips.
Topped with a PWS FSC 556 flash hider and chambered in 5.56 NATO with a .223 Wylde barrel, the MK116 is a versatile upper that pairs with any standard AR-15 lower receiver. The 1:8 twist rate and 2,980 fps velocity give you the ballistic flexibility to run anything from 55-grain varmint loads to heavier match and duty rounds. If you're building a precision carbine, a lightweight hunting rifle, or upgrading to a quality piston-driven platform, this upper delivers the engineering and function that sets PWS apart.
| Barrel Length | 16.1 inches |
| Barrel Twist Rate | 1:8 |
| Muzzle Velocity | 2,980 fps |
| Chambering | 5.56 NATO / .223 Wylde |
| Upper Receiver Material | T6 7075 Forged Aluminum, Hard-Anodized |
| Handguard | PWS PicLok, 15.05 inches |
| Charging Handle | Radian Raptor Ambidextrous |
| Muzzle Device | PWS FSC 556 |
| Operating System | PWS Long-Stroke Piston |
The MK116 Mod 2-M is a standard AR-15 upper receiver and will pair with any mil-spec AR-15 lower receiver. You're not locked into a proprietary platform.
Yes. The PWS PicLok system is designed to accept both Picatinny rail and M-LOK attachments directly, without requiring separate adapters or rail sections.
The forward assist is omitted by design. Many experienced shooters prefer the cleaner profile and find it unnecessary on a properly tuned, reliable piston-driven upper. If you prefer one, you'll want to confirm compatibility with your chosen lower receiver.
Yes. The .223 Wylde barrel, 1:8 twist, and quality forged construction make this upper capable across precision rifle, hunting, and competition applications. The piston system and integrated features prioritize reliability and shootability.
SKU: 152747137 • Width: 4in • Height: 4in • Depth: 32.75in • Weight: 5.4oz