PWS MK1 Mod 1-M Upper | .223 Wylde | 11.85″

The PWS MK1 Mod 1-M complete upper is a compact, piston-driven AR-15 upper built for reliability and suppressed use. It ships configured in .223 Wylde with an 11.85″ black anodized barrel and a free-float M-LOK handguard. The design integrates PWS’s long-stroke piston system and mil-spec compatible components to suit users who want a durable, low-maintenance upper assembly.

Common applications include precision varmint or small-game hunting and patrol/field use where suppressed-optimized operation and low maintenance are priorities.

Product Specifications

• The manufacturer is listed as Primary Weapons System (PWS).
• The product type is a Complete Upper Receiver for AR-15 platform rifles.
• The chambering/cartridge is .223 Wylde.
• The barrel length is 11.85″.
• The barrel finish is Black Anodized.
• The external finish is Anodized.
• The color is specified as Black.
• The upper is designed to fit AR-15 platform lowers.
• The model designation is shown as MK1 / MK111 Mod 1-M across supplied records.
• The handguard style is a Free-float M-LOK design.
• The gas system is a PWS long-stroke piston with adjustable gas settings.
• The compensator included is the PWS FRC 2-Port Compensator (suppressor-compatible).
• The charging handle supplied is a Radian Raptor Ambidextrous model.
• The receivers are described as forged 7075-T651 aluminum.
• The listed UPC is 811154033468.

This PWS MK1 Mod 1-M upper combines a suppression-oriented barrel length with a piston-driven gas system and a free-float M-LOK handguard to deliver a compact, low-fouling AR-15 upper. It is well suited for shooters who prioritize reliable function with suppressed firearms and those who want a durable, serviceable platform component that accepts standard AR-15 accessories.