1 1

HK416 / MR556 30-Round Steel Magazine — 5.56mm | Genuine HK (Part #251770S)

HK416 / MR556 30-Round Steel Magazine — 5.56mm | Genuine HK (Part #251770S)

$85.00 USD
$85.00 USD
Sale Sold out
Shipping calculated at checkout.

Low stock: 1 left

Factory-built reliability for every HK 

Genuine Heckler & Koch steel 30-round magazine designed for HK416 and MR556 rifles. Built in Germany to HK’s exacting standards, this magazine delivers reliable feeding, rugged durability, and precise fitment for OEM performance in service and range rigs.

Key Features

  • Genuine HK factory part — Part #251770S
  • 5.56×45 NATO, 30-round capacity
  • Durable steel construction for long life and rugged use
  • Engineered for perfect fit with HK416 / MR556 platforms
  • Tested for reliable feeding and consistent function

Add authentic HK quality to your build — Order now while in stock.

Compatible With: 

  • HK416 / MR556 / MR223 
  • AR-15
  • Any Firearm that uses NATO-Standard 5.56mm Magazines 
View full details

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
HK416 Ejection Port Axle