The Primary Weapons Systems MK216 Upper 18" 308 Win Black is a complete upper receiver built for shooters who want a refined AR10/SR25-compatible top end. Featuring an 18" barrel capped with the PWS FRC Comp muzzle device, this upper is designed to deliver smooth recoil characteristics and consistent accuracy in a durable, matte black package.

This MK216 upper is chambered in .308 Winchester, making it a strong choice for extended range sessions, training, and hunting where reliable performance and energy on target matter. Its long, free-floated handguard offers generous space for optics and accessories, while the overall design reflects PWS’s focus on reliability and user-friendly handling. It is a solid upgrade path for builders who trust Primary Weapons Systems’ engineering and craftsmanship.

Key Features:

• Manufacturer: Primary Weapons Systems
• Model: MK216 Upper
• Caliber: .308 Winchester
• Barrel Length: 18"
• Type: Upper Receiver
• Finish Color: Matte Black
• Unique Features: FRC Comp Muzzle Device, AR10/SR25 Compatibility