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HK416, MR556 PDW Piston Rod, Complete Assembly

HK416, MR556 PDW Piston Rod, Complete Assembly

$150.00 USD
$150.00 USD
Sale Sold out
Shipping calculated at checkout.

Low stock: 5 left

The HK416 / MR556 PDW Piston Rod Complete Assembly is a factory-original Heckler & Koch OEM part, professionally modified for the PDW (Personal Defense Weapon) configuration. Built to maintain proper gas timing and reliable cycling in short-barrel HK setups, this assembly delivers the same legendary HK performance in a compact form factor.

Key Features:

  • Factory OEM HK part — genuine Heckler & Koch manufacture
  • Modified specifically for HK416 / MR556 PDW configurations
  • Precision-machined and heat-treated for durability
  • Ensures proper gas operation in short-barrel systems
  • Complete and ready to install — no fitting required

Built for reliability. Order your HK416 / MR556 PDW Piston Rod Complete Assembly today.

Compatible with: 

  • HK 416 PDW
  • HK MR556 PDW
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Customer Reviews

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Let customers speak for us

from 5 reviews
Kirby Ballard

The shipping was lightning fast, and the website was easy to navigate. Nothing more to say, it was a great shopping experience :)

Nefarious Arms
Anonymous

Great gas block. The fit and finish were exemplary, and the knob was nice and movable, making it easy to turn with the tip of a bullet from various angles. Gassing on a brand new MR556A1 barrel was perfect with the factory-installed 1mm vent screw, giving 1:30-2:30 ejection on N and 3:30-4:30 ejection on S with a B&T SRBS installed. Wonderful product and a great price for everything you get!

NA5 - HK 416A5 Style Adjustable Gas Block
NA5 - HK 416A5 Style Adjustable Gas Block
Mark Milovich

Smooth simple transaction

Nefarious Arms
Mark Milovich

Very nice finish, excellent fit. I like the pin locations have dimpled centres, makes drilling that much easier. Having both the HTX and Nefarious I prefer the latter.

M110 / MKII Gas Block
M110 / MKII Gas Block
BZWS LLC

These are pristine, brand new, unmarked German A3 stripped uppers. They’ve never been assembled. The finish is perfect. Well worth the money.

HK416 A3 Stripped Upper Receiver
HK416 A3 Stripped Upper Receiver