Primary Weapon Systems MK116 Pro Adjustable Piston Rifle .223 Wylde - 16.1"

Manufactured by Primary Weapon Systems
SKU: 19-PM116RA1B
MPN: 19-PM116RA1B
Manufactured by Primary Weapon Systems
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NOTE: Limit 1 per household. Quantities exceeding 1 will not allow checkout.

Items that are regulated by the ATF have restrictions and requirements: 
•Your entire order will ship only to a Federal Firearm License holder.
•Current processing time is approximately 14 to 16 days.
•Please contact your local FFL prior to placing your order to ensure they are still accepting transfers. Due to Covid-19 many are no longer open
•A copy of your order/invoice as well as the current FFL license for your local dealer must be emailed to



For those looking for a new rifle that is different from your standard AR-15 platform, Primary Weapon Systems has you covered. The PWS MK116 Pro Rifle features AR-15 familiarity but utilizes a 3-position adjustable long stroke gas piston system for the ultimate in reliability and smooth function. The gas block adjustment switch is easily accessible through the free float M-LOK handguard, so you can quickly adjust for your setup. The barrel is machined from 416R stainless steel and features a .223 Wylde chamber for extreme accuracy potential. Additionally, the 16.1” barrel is button rifled with a 1:8 twist rate and has a standard A2 flash hider. Change up your AR collection with the PWS MK116 Pro Rifle.

  • 3 Position adjustable long stroke gas piston
  • Mid-Length piston system
  • 16.1” barrel chambered in .223 Wylde
  • 416R stainless steel and Nitride finished
  • A2 flash hider
  • Button rifled 1:8 twist rate
  • Proprietary slick side upper and BCG
  • Radian Raptor charging handle
  • Enhanced H2 buffer, buffer tube, and ratchet locking castle nut and end plate
  • Bravo Company stock and pistol grip
  • M-LOK free float handguard
  • MK1 MOD 1-M lower receiver
  • Mil-Spec enhanced PTFE trigger
  • Enlarged trigger guard
  • Includes 30 round magazine
  • Weight: 6 lbs. 5 oz.

The proprietary piston upper receiver is forged from 6061 aluminum and features a slick side design with an M4 flat top Picatinny rail for easily mounting optics. Even though it uses a proprietary upper and bolt carrier group, it is still compatible with AR-15 charging handles like the ambidextrous Radian Raptor. It also comes with an H2 PWS enhanced buffer weight and fluted buffer tube as well as the ratcheting end plate and castle nut system. Attached to the buffer tube is the Bravo Company Carbine stock to compliment the pistol grip for an ergonomic setup. The lower receiver is forged from 7075-T6 aluminum and is assembled with Mil-Spec parts and an enhanced PTFE coated trigger.

The mission at Primary Weapons Systems is to provide the highest quality tactical and sporting rifles and accessories for sportsmen, military, and law enforcement at a fair, competitive price.
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Barrel CoatingSalt Bath Nitride
Barrel ContourMedium
Barrel Length16.1
Barrel LiningSalt Bath Nitride
Barrel Material416R Stainless Steel
BrandPrimary Weapon Systems
Caliber Gauge.223 Wylde
Gas System LengthMid-Length
Gas System TypeLong Stroke Gas Piston
Muzzle DeviceA2 Flash Hider
Thread Pattern1/2 X 28
Twist Rate1:8
Weight6 lbs. 15 oz.

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