RIS plastic rail cover 12 pcs

Overview

he MK1 series, developed by Primary Weapons Systems, is a significant product improvement for the M4/M16-type carbines and rifles. Using the proven long stroke piston system, the MK1 series greatly reduces fouling in the action of the weapon making it as reliable as the AK47 that it was designed after.

The MK1 series has been used widely in the Iraq and Afghanistan and has gained wide popularity with security personnel, law enforcement and civilians alike.

The origins of the MK1 series began with the fascination in the simplicity and reliability of the AK47 combined with a deep rooted appreciation for the ergonomics of the M4/M16 platform. Having a significant understanding of the deficiencies in the direct gas impingement operating system found on conventional M4/M16-style weapons, PWS developed the MK1 series with the professional operator in mind.

Significant product improvements have been made over both the direct impingement operating system as well as previous offerings of piston driven operating systems currently on the market to improve reliability and performance as well as reduce things such as carrier tilt, cam pin wear and carrier bounce.

An innovative hand guard system utilizes a proprietary non-free float system that allows the end user or unit armorer to replace individual rails as needed without removing the barrel, barrel nut or even other rails. This system

allows the user to attach numerous picatinny rail mounted devices such as sights, lights, and laser aiming devices.

The PWS proprietary operating system utilizes an operating rod that is attached to the carrier and a floating head piston that is attached to the operating rod. The MK1 series is built to be true combat carbine. With no unnecessary gas adjustments and only one moving assembly make this the most rugged, simple and versatile piston operating system available.

The MK1 series is available as complete carbine or rifle or as a “drop-in” MK1 series upper receiver for use on the lower receivers of existing M4/M16 style lowers.

Specifications
Caliber		5.56 NATO
Weight		3 lbs 10 oz (1.6 kg)
Overall Length		16.25" (41.3 cm)
Barrel Length		7" (17.8 cm)
Barrel Specs		Stainless Steel, Polygonal Bore, 1:8 twist
Muzzle Velocity		2300 ft/sec (XM193)
Muzzle Energy		645 ft/lbs

Features

Polygonal Bore 1:8 Twist SS Barrel

Enhanced Charging Handle

Mil Spec Upper Receiver

PWS Enhanced Bolt Carrier Group

Micro-slicked Internals

Tango Down SCAR Rail Panels

PWS CQB Comp

Product User Manual: MK107 User Manual

Simply put, the MK107 Upper is the continued evolution of the venerable Diablo upper - designed for those in harm's way and built with quality in mind instead of price.

*This product ship direct from Primary Weapon Systems (PWS) warehouse at Boise, Idaho. All AR upper require 10 business days to process, and up to 6 business for delivery.

**All NFA Rules Apply to AR Rifle Lowers** Know your State and Local Laws regarding this upper before purchase. This is considered a SBR if mounted to a Rifle Lower Receiver