Shot Sale | Up to 30% Off! Shop Now

Primary Weapons Systems MK116 Pro 16 Inch Complete 5.56 NATO AR-15 Upper Receiver

SKU: 19-PM116UA0B

Out of Stock
Orders will Ship within 1 Business Day
Backed by the PWS Limited Lifetime Warranty!
Only 1 remaining. Order now!
TOP ADD-ON'S
Magpul PMAG M3 30 Round Window - .223 / 5.56 NATO - MAG556

3-Pack - Magpul PMAG M3 30 Round Window - .223 / 5.56 NATO - MAG556 - Black

$51.99

Perfect Balance of a Cost-Effective Piston System & High-Quality Construction

The Primary Weapons Systems MK116 Pro Complete Upper is the perfect balance of a cost-effective piston system and high-quality construction and performance. It features a long-stroke three-setting adjustable gas piston, which is perfect if you’re planning on a variety of ammunition, or adding a suppressor.

The MK116 Pro includes a 15″ Free Float M-LOK handguard and a 416R steel 16.1-inch barrel with a 1:8 twist rate and an A2 flash hider. This complete upper is a great option if you want the reliability of a long-stroke system, with the ability to custom-tune the gas for optimal recoil control.

Features:

  • PWS carbine-length long-stroke piston system – combines the agility of the AR-15 with the reliability of the AK-47 into a sleek and efficient design
  • 3 easy to adjust gas settings
  • Perfect for shooters looking for a cost-effective piston system without sacrificing high quality
  • Continuous Picatinny top rail
  • Free Float M-LOK rail system
  • Radian Raptor ambidextrous charging handle
  • Extruded upper receiver that integrates an extremely solid handguard attachment system
  • The PRO line is the best value on the market for piston-driven operating systems

Specifications:

  • Operating System: PWS Long Stroke Piston System, 3 settings Adjustable Gas Regulator
  • Caliber: .223 Wylde
  • Barrel Length: 16.1”
  • Gas System Length: Mid-Length
  • Barrel Twist Rate: 1:8
  • Barrel Profile: Government
  • Muzzle Velocity: 2980 fps
  • Muzzle Device: A2 Flash Hider
  • Upper Receiver: PWS Proprietary Piston Upper, 6061 extrusions, Anodized
  • Handguard: PWS M-Lok™ 15” Handguard (1.7” width, 2.25” height)
  • Charging Handle: Radian Raptor™ Ambidextrous Charging Handle

The AT3 Tactical store has a 90 day no-hassle return policy for products in good condition. You can view the full details of our return policy here.

If you encounter an issue or defect with a product after 90 days of your purchase, you can refer to the manufacturer for a warranty claim. Their policies are below.

PWS Limited Lifetime Warranty

If you have questions regarding a product, and you believe you may have a warranty issue, please review our FAQ, manuals, instructions, and other resources.

If the FAQ page and/or manual/instruction pages do not answer your question, please contact either our customer service or warranty team below.

Email is the preferred method of contact, as it accurately captures detail, provides a written record to refer to, and allows photos and videos to be sent.

Our department’s expectation is to return emails and voicemails within 2 business days. Please note that PWS is closed for most major holidays and our sales team does travel for shows throughout the year. During these times, we may not meet these expectations but will do our best to keep up. If you’re unable to reach a specific person via phone, please call our main phone number (208) 344-5217 and choose whichever department is most applicable.

Upon contacting us, if it is determined that an RMA should be started, please click here to go through the PWS Warranty RMA Process.

For more information on our RMA system, including instructions on how to open a ticket, check the status of your ticket, and more, please click here.

Contact Details:

  • Email: warranty@primaryweapons.com.
  • Phone: (208) 344-5217

Disclaimer: Manufacturer’s warranty is subject to change without prior notice.

Customers who viewed this item also viewed these products

Daniel Defense DDM4V7 16 Inch Complete Lightweight 5.56 AR-15 Upper Receiver - AT3 Tactical

Daniel Defense DDM4V7 16 Inch Complete Lightweight 5.56 AR-15 Upper...

(no reviews yet)
$1,156.00
Daniel Defense Upper with Chrome Lined Lightweight Profile Barrel Daniel Defense’s lightweight barrels make
2A Armament Palouse-Lite 16 Inch M-LOK 5.56 NATO AR-15 Upper Receiver - AT3 Tactical

2A Armament Palouse-Lite 16 Inch M-LOK 5.56 NATO AR-15 Upper...

(no reviews yet)
$739.00
Cost Effective, Super Lightweight Upper 2A Armament’s Palouse-Lite upper saves on weight dramatically compared
Sons of Liberty Gun Works M4-76 16 Inch Complete 5.56 NATO Upper Receiver - AT3 Tactical

Sons of Liberty Gun Works M4-76 16 Inch Complete 5.56...

(no reviews yet)
$855.00
SOLGW Complete Upper with M76 Wedge Lock Handguard This Sons of Liberty Gun Works

HM Defense MONOBLOC 16 Inch Complete 5.56 AR-15 Upper Receiver...

(no reviews yet)
$775.00
Cost-Effective Complete Upper Receiver for A High-Performance AR-15 Build This HM Defense BUP Complete

Spike's Tactical Complete AR-15 Upper Receiver with 16 Inch M4...

(no reviews yet)
$837.00
Complete Upper with M4 Profile Hammer Forged FN Barrel Rugged and ready for duty,
Primary Weapons Systems MK116 MOD 2-M 16 Inch Complete 5.56 NATO AR-15 Upper Receiver - AT3 Tactical

Primary Weapons Systems MK116 MOD 2-M 16 Inch Complete 5.56...

(no reviews yet)
$1,299.95
Long Stroke Piston Upper with Lightweight PicLok Handguard The PWS MK116 MOD 2-M features
Troy A3 16 Inch Complete 5.56 NATO M-LOK Upper Receiver with Backup Sights - AT3 Tactical

Troy A4 16 Inch Complete 5.56 NATO M-LOK Upper Receiver...

(no reviews yet)
$750.00
Complete Troy Upper with SOCC Handguard and Backup Iron Sights Duty ready with modern
Radical Firearms 16" 5.56 NATO Complete Upper Receiver with M-LOK Handguard - AT3 Tactical

Radical Firearms 16" 5.56 NATO Complete AR 15 Upper Receiver...

$449.99
Complete Budget-Friendly Upper Receiver for 5.56 NATO AR Builds The Radical Firearms 16″ 5.56

Spike's Tactical Complete AR-15 Upper Receiver with 16 Inch Midlength...

(no reviews yet)
$630.00
Complete Upper with Midlength Hammer Forged FN Barrel Rugged and ready for duty, this
Primary Weapons Systems MK116 MOD 1-M 16 Inch Complete 5.56 NATO AR-15 Upper Receiver - AT3 Tactical

Primary Weapons Systems MK116 MOD 1-M 16 Inch Complete .223...

(no reviews yet)
$1,029.49
Combines Agility & Reliability For A Sleek, Efficient Piston Driven Upper Assembly The PWS
Daniel Defense M4A1 URG 14.5 Inch Pinned and Welded Complete 5.56 AR-15 Upper Receiver - AT3 Tactical

Daniel Defense M4A1 URG 14.5 Inch Pinned and Welded Complete...

(no reviews yet)
$1,426.00
Top-Quality Complete Upper Assembly from Daniel Defense The Daniel Defense M4A1 URG Complete Upper
STNGR Complete AR-15 Upper Receiver with 16 Inch Barrel, BCG and Charging Handle - RPTR Handguard, Black

STNGR 16" .223 Wylde Complete Upper Receiver w/ 15" RPTR®...

(no reviews yet)
$499.99$399.99
STNGR Complete .223 Wylde Upper with RPTR Handguard The RPTR complete upper from STNGR
STNGR VLCN Complete 5.56 Pistol Upper with 11.5 Barrel and Flash Can - Black

STNGR 11.5 Inch 5.56 Complete Upper w/ 12.5 Inch VLCN®...

(no reviews yet)
$499.99$399.99
STNGR Complete 11.5 Inch Pistol Upper with VLCN Handguard and Flash Can This VLCN
STNGR Complete AR-15 Upper Receiver with 16 Inch Barrel, BCG and Charging Handle - VYPR Handguard, Black

STNGR 16" .223 Wylde Complete Upper Receiver w/ 15" VYPR®...

(no reviews yet)
$499.99$399.99
STNGR Complete .223 Wylde Upper with VYPR Handguard The VYPR complete upper from STNGR
Sons of Liberty Gun Works M4-EXO3 13.7 Inch Pinned and Welded Complete 5.56 NATO Upper Receiver - AT3 Tactical

Sons of Liberty Gun Works M4-EXO3 13.7 Inch Pinned and...

$807.50
SOLGW Complete Upper with EXO3 Handguard and NOX Flash Hider This complete AR-15 upper

Questions & Answers

Don't see the answer
you're looking for?

Loading questions...