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HK416, MR556 PDW Piston Rod, Complete Assembly

HK416, MR556 PDW Piston Rod, Complete Assembly

$150.00 USD
$150.00 USD
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Shipping calculated at checkout.

Out of stock

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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Let customers speak for us

from 42 reviews
Jake

Very high quality and definitely adds pressure to the system.

Enhanced Reliability Gas Piston
Enhanced Reliability Gas Piston
Sal

Top notch work and awesome service!

Custom Barrel Dimpling
Custom Barrel Dimpling
Meridian Ordnance LLC

Excellent option for the MR556A4 and 416 clones.

Nefarious Arms HK416 / MR556 Barrel, 14.5" LIGHT, 5.56x45mm NATO
Nefarious Arms HK416 / MR556 Barrel, 14.5" LIGHT, 5.56x45mm NATO
Sextus

Marvin and his products are top notch. Perfect fitment, excellent quality. These are the best barrels outside fo factory HK that one can buy!

Nefarious Arms HK416 A5 / G38 Barrel, 11", 5.56x45mm NATO
Nefarious Arms HK416 A5 / G38 Barrel, 11", 5.56x45mm NATO
Rick

Excellent parts / tools and fast shipping service

Nefarious Arms
Rick

For your barrel nut torquing a must have precision made tool. Excellent machined quality to use on a number of AR , KAC , Centurion Arms or HK variants.
Nicer than other popular and similar tools I have. protect your barrel extension index pin! Get one!

Reaction Rod – Armorer’s Multi-Platform Upper Receiver Holding Tool
Reaction Rod – Armorer’s Multi-Platform Upper Receiver Holding Tool
Brian Bell

Great part. Will install on my next build.

HK416 / MR556 / G36 Complete Gas Piston #50205381
HK416 / MR556 / G36 Complete Gas Piston #50205381
Brian Bell

Excellent service, fast shipping thank you!!

Nefarious Arms
Brian Bell

Excellent Quality, fast shipping what more could a man ask for. Thank you as always.

Barrel Nut - HK416 A5
Barrel Nut - HK416 A5
THANH D. LY

High quality and fast shipping

M110 / MKII Gas Block
M110 / MKII Gas Block
Anonymous

Quality is absolutely stellar. Nefarious arms nails it everytime

Barrel Nut - HK416 A5
Barrel Nut - HK416 A5
Anonymous

Quality is absolutely stellar. Nefarious arms nails it everytime

Enhanced Reliability Gas Piston
Enhanced Reliability Gas Piston
Zach Martin

Barrel is absolutely perfection. Knocked it out of the park

Nefarious Arms HK416 / MR556 Barrel, 10.4" HEAVY, 5.56x45mm NATO
Nefarious Arms HK416 / MR556 Barrel, 10.4" HEAVY, 5.56x45mm NATO
Zach Martin

Quality is absolutely stellar. Nefarious arms nails it everytime

Nefarious Arms
Anonymous

Quality is absolutely stellar. Nefarious arms nails it everytime

HK416 Ejection Port Axle
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