MK110, 10.5", 5.56, Piston Driven Upper

Our Products: PWS Uppers

SKU: MK110u_556

Weight: 4 lbs 15 ozs

The MK110, a 10.5" variant of the MK1 series uppers chambered in 5.56 NATO. More details...

Price: $1,199.95

Availability: Typically ships within 10 days

MK110, 10.5", 5.56, Piston Driven Upper

MK110, 10.5", 5.56, Piston Driven Upper	MK110, 10.5", 5.56, Piston Driven Upper	MK110, 10.5", 5.56, Piston Driven Upper
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Product Details

The MK1 series, developed by Primary Weapons Systems, is a significant product improvement for the M4/M16-type carbines and rifles.� Utilizing our 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 in Iraq and Afghanistan, and has gained wide popularity with security personnel, law enforcement and civilians alike.

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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.

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Significant product improvements have been made over both the direct impingement operating system and previous offerings of piston-driven operating systems.� Our product improvements have addressed reliability and performance issues as well as reduced carrier tilt, cam pin wear and carrier bounce.

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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 a true combat carbine.� With no unnecessary gas adjustments and only one moving assembly, this is the most rugged, simple and versatile piston operating system available.

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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.

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Specifications
Caliber	�	5.56 NATO
Weight	�	4�lbs�2 oz�(1.87 kg)
Overall Length	�	19.1" (48.5 cm)
Barrel Length	�	10.5"�(26.7 cm)
Barrel Specs	�	Hard Chrome lined, button rifled, 1:8 twist
Muzzle Velocity	�	2699�ft/sec (XM193)
Muzzle Energy		889�ft/lbs
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Features

Hard Chrome Lined, Button Rifled, 1:8 Twist

Enhanced Charging Handle

Mil Spec Upper Receiver

PWS Enhanced Bolt Carrier Group

Micro-slicked Internals

Tango Down SCAR Rail Panels

A2 Flash Hider�

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Product User Manual

MK1 User Manual

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Videos

MK110 & MK116 Demo Video

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Product Reviews

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"DC-10 with FSC556"

Sean Z on 3/10/2010 12:36:06 AM

Product Review: Went through the first 300 rounds at an indoor range. I like it because FSC556 really works, I have it on a pistol lower, and it had minium muzzle flips. Fired with Winchester 55gr, Remington 55gr, Federal 55gr and American Tactical 62gr. For some reason my DC-10 doesn't like American Tactical ammo, my gunsmith said the American Tactical has bad powder.

"Best 10"

Ryan Peterson on 1/12/2010 9:29:45 PM

Product Review: I have had this upper for about six weeks now. I have around 3520rds though my gun. Not one failer! Cleaning is easy! Just a quick wipe down. I just did a 16 mag dump and got the gun really hot. Not one jam. Very reliable!

"DC-10"

R. Yawn on 11/23/2009 5:13:16 PM

Product Review: Incredible product. Quality, fit and finish is top notch. I highly recommend this product to anyone who is looking for a finely machined upper with outstanding workmanship and reliability. So far I have experienced 0 malfunctions, shooting both suppressed and unsuppressed with loads of various quality, with the upper . Additionally, customer service is some of the best I have experience. Thank you.