The Primary Weapons MK114 Mod 1-M Upper 223 Wylde 14.50" Anodized Barrel for AR-15 is built for shooters who want a refined, piston-driven upper that drops onto any standard AR-15 lower. Featuring a 14.5" 416R steel barrel with an anodized finish and a complete upper assembly, this MK114 Mod 1-M delivers smooth cycling, reduced fouling, and dependable accuracy with the versatile .223 Wylde chamber.

This upper is well suited for range use, training, and practical competition where reliability and controllable recoil matter. The long-stroke piston system and adjustable gas settings help maintain consistent performance across different ammunition types and when running suppressed or unsuppressed. With its M-LOK handguard and full-length Picatinny rail, the MK114 Mod 1-M Upper offers ample mounting space for optics and accessories, reflecting Primary Weapons’ focus on thoughtful engineering and durable craftsmanship.

• Manufacturer: Primary Weapons
• Model: MK114 Mod 1-M Upper
• Caliber: 223 Wylde
• Barrel Length: 14.50"
• Unique Features: Long Stroke Piston System, Adjustable Gas System, M-LOK Handguard, Complete Upper Assembly
• Weight: 4.9 lbs