- Fits Mil-Spec AR-15 Lowers
- PWS Long Stroke Piston System
- 11.85-inch FNC-HD Nitrided Barrel, 1:8 Twist
- Accepts .223 Remington and 5.56 NATO
- 3-Position Adjustable Gas Regulator, Suppressor-Ready
- Free-Float M-LOK Handguard
- Forward Assist Controls
- Includes BCG
- Color: Black
- Caliber: .223 Wylde
- MPN: MK1-M1U-223-11
The PWS MK1 Mod 1-M is a complete piston-driven upper receiver for mil-spec AR-15 lowers chambered in .223 Wylde, accepting both .223 Remington and 5.56 NATO ammunition. The 11.85-inch FNC-HD nitrided barrel features a 1:8 twist, and the PWS Long Stroke Piston system with adjustable gas regulator delivers reliable cycling suppressed or unsuppressed. Forward assist controls maintain a traditional mil-spec interface. The free-float M-LOK handguard keeps the package maneuverable. Ships with bolt carrier group.
