Heckler & Koch

H&K MR556 A4 5.56mm NATO 11in 10rd Semi-Auto Pistol (81001051)

Heckler & Koch H&K MR556 A4 5.56mm NATO 11in 10rd Semi-Auto Pistol (81001051) - Complete Rifle - view 1
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This is a serialized firearm.

Heckler & Koch

Overview

The Heckler & Koch H&K MR556 A4 5.56mm NATO 11in 10rd Semi-Auto Pistol (81001051) is a complete rifle. Compare prices from multiple merchants and find the best deal.

Specifications

MPN81001051
PlatformAR-15
Caliber5.56 NATO
Gas System LengthCarbine
Thread Pitch1/2x28
Action TypeSemi-Auto
Twist Rate1:7
ColorBlack
Barrel Length11.0
ComplianceStandard

Available Merchants(1)

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$3,749
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August 2026 on GunPartPicker

Heckler & Koch H&K MR556 A4 5.56mm NATO 11in 10rd Semi-Auto Pistol (81001051) was the sixth most added complete rifle on GunPartPicker in August 2026. Builders have been adding it to their builds on GunPartPicker since March 2026. All time, it is the seventh most added complete rifle on the site.

It was out of stock everywhere we track for all of August 2026, and today the one retailer we track is out of stock. Listed prices start at $3,749 at Classic Firearms for when it comes back.

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