Primary Weapons Systems MK118 Mod 1-M Upper 6mm ARC 18in Threaded

Description

Product Overview

The Primary Weapons Systems MK118 Mod 1-M upper is chambered in 6mm ARC and built on PWS’s Long Stroke Piston System for reliable cycling and reduced fouling. This 18-inch threaded setup is paired with a 3-setting adjustable gas system to help tune performance across varying conditions, including suppressor use. The result is a versatile upper designed to support flat shooting ballistics with dependable operation.

Key Features

• 6mm ARC chambering for efficient performance and responsive recoil characteristics
• 18-inch barrel length for a balanced precision and velocity profile
• PWS Long Stroke Piston System for reliability and reduced fouling compared to direct-impingement designs
• 3-setting adjustable gas system for fine-tuning, including suppressed operation
• Threaded muzzle for suppressor and device compatibility

Built for precision-focused setups and dependable field use, this MK118 Mod 1-M upper gives you a tuned piston platform in 6mm ARC with an 18-inch threaded barrel.