Primary Weapons MK116 MoD 2-M 223 Wylde 16Inch Complete Upper Receiver with FSC 556

The Primary Weapons Systems MK116 MOD 2-M .223 Wylde Complete Upper Receiver is a 16-inch piston-driven AR-15 upper designed for enhanced reliability, reduced fouling, and suppressed shooting performance. Built around a long-stroke gas piston system with a 3-position adjustable gas regulator, it delivers consistent cycling across a wide range of ammunition while minimizing carbon buildup in the receiver.

Chambered in .223 Wylde, this upper safely and accurately supports both .223 Remington and 5.56 NATO cartridges. It features a precision 16.1-inch barrel with a 1:8 twist rate for stabilization of multiple bullet weights, along with a PWS FRC 2-port compensator for recoil and muzzle control. The PicLok handguard combines Picatinny and M-LOK interfaces for versatile accessory mounting, and the system is completed with a Radian Raptor ambidextrous charging handle.

Product Details

• Manufacturer: Primary Weapons Systems
• Platform: AR-15 complete upper receiver
• Caliber: .223 Wylde (supports .223 Remington and 5.56 NATO)
• Barrel Length: 16.1"
• Twist Rate: 1:8
• Gas System: Long-stroke piston system
• Gas Adjustment: 3-position adjustable system (suppressed tuning capable)
• Muzzle Device: PWS FRC 2-port compensator (Rearden Atlas compatible)
• Handguard: PicLok (Picatinny + M-LOK hybrid)
• Color: Black
• Weight: Approximately 4.6 lbs
• Made in: USA

Product Features

• Piston-driven operating system reduces fouling in receiver
• 3-position adjustable gas system for suppressed and unsuppressed use
• .223 Wylde chamber for improved accuracy and dual-caliber compatibility
• 16.1" barrel with 1:8 twist rate for versatile bullet stabilization
• Sub-MOA accuracy potential with quality ammunition
• PWS FRC 2-port compensator reduces recoil and muzzle rise
• Compatible with Rearden Atlas suppressor mounting systems
• PicLok handguard supports both Picatinny and M-LOK accessories
• Radian Raptor ambidextrous charging handle included
• Designed for durability, accuracy, and suppressed shooting performance