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Primary Weapons Systems MK116
California Proposition 65 Warning

This product can expose you to chemicals including lead, known to cause cancer and birth defects. For more info visit P65Warnings.ca.gov.

Primary Weapons Systems

MK116

$1,209.95
$1,129.95
Sale Price
Available California compliant

Primary Weapons Systems MMK116 MOD 1-M, Upper Receiver, 762X39, 16.1" Barrel, Triad30 Muzzle Device, Anodized Finish, Black, Radian Raptor Charging Handle, MLOK Handguard, Fits AR-15 MK1-M1U-762X39-16

Key Details
Brand Primary Weapons Systems
Manufacturer Part Number MK1-M1U-762X39-16
UPC 811154033512
SKU PWSMK1-M1U-762X39-16
Current Stock 6 available
Quantity Updated Apr 26, 2026 3:05 PM
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Purchase Requirements
  • Final availability is confirmed at checkout.
In-Store Pickup Required: All firearm purchases must be picked up at our Beverly Hills location after background check completion.
Product Description

The MK1 MOD 1-M line, revamped for 2018, features the PWS long stroke piston system. Internally, this line offers the tried and true system that PWS owners have grown to know and love. Featuring a free-float MLOK handguard, forward assist controls, and a more true to mil-spec design, the MK1 MOD 1-M line is a go-to for not only civilians, but also Law Enforcement. With the fully forged upper and lower receivers, the MK1 MOD 1-M is a no-nonsense tool for when you need a high value option that is relentless and unstoppable.

Features
  • Operating System: PWS Long Stroke Piston System, 3 setting Adjustable Gas Regulator
  • Gas System Length: Mid-Length
  • Barrel Twist Rate: 1:8
  • Muzzle Velocity: 2980fps
  • Muzzle Device: PWS FSC 556
  • Upper Receiver: PWS Proprietary Piston Upper, T6 7075 Forged, Anodized
  • Handguard: PWS M-Lok 15.05 Handguard (1.7" width, 2.25" height)"
  • Charging Handle: Radian Raptor Ambidextrous Charging Handle
Specifications
UPC: 811154033512
Manufacturer: Primary Weapons Systems
Manufacturer Part #: MK1-M1U-762X39-16
Model: MK116
Model (Alt): MOD 1
Barrel Length: 16.1"
Finish: Anodized
Type: Upper