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Heckler & Koch MR556 for Sale

Founded: 1949

HQ: Germany

The Heckler & Koch MR556 is a semi-automatic rifle using a gas-operated short-stroke piston and rotating bolt, derived from the HK416, chambered in 5.56×45mm NATO. Its standout feature is a German-made, cold hammer-forged, non-chrome-lined 16.5-inch barrel.

No active auctions for Heckler & Koch MR556.

Recently Sold

Heckler & Koch MR556A1 5.56 NATO H&K AR-15 AR15 16.5 MR 556 A1 +2 MAGS

Sold On 06/26/2026

Heckler & Koch MR556A1 5.56 NATO H&K AR-15 AR15 16.5 MR 556 A1 +2 MAGS

Heckler & Koch MR556A1 HK MR556 A1 AR-15 AR15

Heckler & Koch MR556 A4 5.56 AR-15 AR15 H&K MR556A4 16.5" 416 PISTON +CASE

Sold On 06/07/2026

Heckler & Koch MR556 A4 5.56 AR-15 AR15 H&K MR556A4 16.5" 416 PISTON +CASE

Heckler & Koch MR556 A4 HK MR 556 A-4 AR15 AR-15

Heckler & Koch MR556A1 5.56 NATO H&K 556A1 AR-15 AR15 16.5 MR 556 A1 PISTON

Sold On 05/22/2026

Heckler & Koch MR556A1 5.56 NATO H&K 556A1 AR-15 AR15 16.5 MR 556 A1 PISTON

Heckler & Koch MR556A1 HK MR556-A1 AR-15 AR15 416

Heckler & Koch MR556 A4 Pistol 5.56 H&K AR-15 AR15 MR 556 PISTON +ORIG CASE

Sold On 05/15/2026

Heckler & Koch MR556 A4 Pistol 5.56 H&K AR-15 AR15 MR 556 PISTON +ORIG CASE

Heckler & Koch MR556 A4 556 MR H&K AR-15 AR15 416

Heckler & Koch MR556A1 Competition H&K 5.56 NATO PISTON 6 MAGS, CASE, SCOPE

Sold On 05/11/2026

Heckler & Koch MR556A1 Competition H&K 5.56 NATO PISTON 6 MAGS, CASE, SCOPE

Heckler & Koch MR556A1 H&K MR556-A1 416 LINEAGE

LIKE-NEW Heckler & Koch H&K MR556A1 5.56 NATO 16.5 MR556 416 +5 MAGS, CASE

Sold On 04/24/2026

LIKE-NEW Heckler & Koch H&K MR556A1 5.56 NATO 16.5 MR556 416 +5 MAGS, CASE

Heckler & Koch H&K MR-556A1 MR556 SHORT-STROKE

Heckler & Koch H&K HK MR556 A4 5.56 NATO AR-15 AR15 11" 416 HK416 +OG CASE

Sold On 04/08/2026

Heckler & Koch H&K HK MR556 A4 5.56 NATO AR-15 AR15 11" 416 HK416 +OG CASE

Heckler & Koch H&K HK MR556 MR 556 AR-15 AR15 416

Heckler & Koch H&K HK MR556 A4 5.56 NATO AR-15 AR15 16.5" +2 MAGS & OG CASE

Sold On 03/25/2026

Heckler & Koch H&K HK MR556 A4 5.56 NATO AR-15 AR15 16.5" +2 MAGS & OG CASE

Heckler & Koch MR556 A4 MR-556 AR-15 AR15 Rifle

Heckler & Koch H&K HK MR 556 A1 5.56 NATO 16.5" FDE MR556A1 HK416 Rifle

Sold On 03/20/2026

Heckler & Koch H&K HK MR 556 A1 5.56 NATO 16.5" FDE MR556A1 HK416 Rifle

Heckler & Koch H&K HK MR556 A1 MR556A1 HK416 Sport

LIKE-NEW Heckler & Koch H&K HK MR 556 A4 Pistol 5.56 NATO AR-15 AR15 11"

Sold On 03/18/2026

LIKE-NEW Heckler & Koch H&K HK MR 556 A4 Pistol 5.56 NATO AR-15 AR15 11"

Heckler & Koch H&K MR556 A4 AR-15 AR15 Tactical

Heckler & Koch H&K HK MR556A1 5.56 NATO AR-15 AR15 MR556 416 Rifle +OG CASE

Sold On 03/18/2026

Heckler & Koch H&K HK MR556A1 5.56 NATO AR-15 AR15 MR556 416 Rifle +OG CASE

Heckler & Koch H&K HK MR-556-A1 416 AR-15 AR15

416 PATTERN Heckler & Koch MR556A1 5.56 NATO AR-15 AR15 16.5" MR556 +CASE

Sold On 03/16/2026

416 PATTERN Heckler & Koch MR556A1 5.56 NATO AR-15 AR15 16.5" MR556 +CASE

GERMAN HK MR556A1 556 AR-15 AR15 MR556

Heckler & Koch H&K MR556A1 AR-15 AR15 16.5" MR-556-A1 5.56X45 + ORIG CASE

Sold On 03/13/2026

Heckler & Koch H&K MR556A1 AR-15 AR15 16.5" MR-556-A1 5.56X45 + ORIG CASE

Heckler & Koch MR556A1 M-416 MR 556 A1 AR-15 AR15

Heckler & Koch H&K HK MR556A1 5.56 NATO AR-15 AR15 16.5" HK416 416 OG CASE

Sold On 03/11/2026

Heckler & Koch H&K HK MR556A1 5.56 NATO AR-15 AR15 16.5" HK416 416 OG CASE

Heckler & Koch H&K HK MR556A1 556 AR-15 AR15 HK416

Heckler & Koch H&K HK MR556 A4 5.56 NATO AR-15 AR15 416 D HK416 +ORIG CASE

Sold On 02/04/2026

Heckler & Koch H&K HK MR556 A4 5.56 NATO AR-15 AR15 416 D HK416 +ORIG CASE

Heckler & Koch H&K MR556 MR 556 AR-15 AR15 Rifle

416 PATTERN Heckler & Koch MR556A1 5.56 NATO AR-15 AR15 16.5" MR556 +CASE

Sold On 01/09/2026

416 PATTERN Heckler & Koch MR556A1 5.56 NATO AR-15 AR15 16.5" MR556 +CASE

GERMAN H&K HK MR556A1 556 AR-15 AR15 MR556

Heckler & Koch H&K HK MR556 A4 5.56 NATO AR-15 AR15 16.5" +ORIG CASE

Sold On 12/19/2025

Heckler & Koch H&K HK MR556 A4 5.56 NATO AR-15 AR15 16.5" +ORIG CASE

H&K HK MR556 A4 556 AR-15 AR15 416-Style MR556A4

416 PATTERN HK MR556 A4 5.56 NATO 16.5" 2MAGS & ORIG CASE

Sold On 12/17/2025

416 PATTERN HK MR556 A4 5.56 NATO 16.5" 2MAGS & ORIG CASE

Heckler & Koch H&K MR556 A4 556 MR556A4 M-LOK

Sell a Gun Consign a Gun

416 STYLE Heckler & Koch H&K HK MR556A1 5.56 NATO AR-15 AR15 16.5" MR556

Sold On 11/14/2025

416 STYLE Heckler & Koch H&K HK MR556A1 5.56 NATO AR-15 AR15 16.5" MR556

H&K HK MR556A1 556 AR-15 AR15 MR556-A1

416 STYLE Heckler & Koch H&K HK MR556A1 5.56 NATO AR-15 AR15 16.5" +2 MAGS

Sold On 11/12/2025

416 STYLE Heckler & Koch H&K HK MR556A1 5.56 NATO AR-15 AR15 16.5" +2 MAGS

H&K HK MR556A1 556 AR-15 AR15 MR556-A1

Heckler & Koch H&K HK MR556A1 5.56 NATO AR-15 AR15 16.5" 416 HK416

Sold On 11/10/2025

Heckler & Koch H&K HK MR556A1 5.56 NATO AR-15 AR15 16.5" 416 HK416

Heckler & Koch H&K HK MR556A1 556 AR-15 AR15 416

416 STYLE Heckler & Koch MR556A1 5.56 NATO AR-15 AR15 16.5" +ORIG CASE

Sold On 10/17/2025

416 STYLE Heckler & Koch MR556A1 5.56 NATO AR-15 AR15 16.5" +ORIG CASE

GERMAN MADE H&K HK MR556A1 556 AR-15 MR556-A1

Heckler & Koch H&K HK MR556A1 5.56 NATO AR-15 AR15 16.5" MR556

Sold On 09/19/2025

Heckler & Koch H&K HK MR556A1 5.56 NATO AR-15 AR15 16.5" MR556

Heckler & Koch H&K HK MR556A1 MR556 AR-15 AR15

Heckler & Koch (HK) MR556A1 16.5" MR556-A1 AR-15 AR15 +4 MAGS & ORIG CASE

Sold On 09/15/2025

Heckler & Koch (HK) MR556A1 16.5" MR556-A1 AR-15 AR15 +4 MAGS & ORIG CASE

Heckler & Koch MR556A1 H&K MR-556 416-Style

Heckler & Koch H&K HK MR556 A4 5.56 NATO AR-15 AR15 MR 556 HK416 +ORIG CASE

Sold On 09/10/2025

Heckler & Koch H&K HK MR556 A4 5.56 NATO AR-15 AR15 MR 556 HK416 +ORIG CASE

Heckler & Koch H&K HK MR556 MR 556 416 AR-15 AR15

Heckler & Koch H&K HK MR556A1 5.56 NATO AR-15 AR15 MR556 A1 MR-556

Sold On 08/08/2025

Heckler & Koch H&K HK MR556A1 5.56 NATO AR-15 AR15 MR556 A1 MR-556

Heckler & Koch H&K HK MR556A1 556 AR-15 AR15 MR556

Heckler & Koch (H&K-HK) MR 556 A1 5.56 NATO 16.5" H&K-HK-MR 556-A1 MR556A1

Sold On 04/28/2025

Heckler & Koch (H&K-HK) MR 556 A1 5.56 NATO 16.5" H&K-HK-MR 556-A1 MR556A1

Heckler & Koch (H&K-HK) MR 556 A1 AR-15 AR15 AR

Heckler & Koch MR 556 A1 5.56 NATO AR-15 AR15 AR 16 3/8" H&K-HK MR-556-A1

Sold On 04/25/2025

Heckler & Koch MR 556 A1 5.56 NATO AR-15 AR15 AR 16 3/8" H&K-HK MR-556-A1

Heckler & Koch MR 556 AR-15 AR15 H&K-HK MR-556-A1

Heckler & Koch H&K-HK MR 556 A1 5.56 NATO 16.5" HK-MR-556-A1 AR15 +3 MAGS

Sold On 03/21/2025

Heckler & Koch H&K-HK MR 556 A1 5.56 NATO 16.5" HK-MR-556-A1 AR15 +3 MAGS

Heckler & Koch H&K-MR 556 A1 AR-15 HK-MR-556-A1

Heckler & Koch MR556A1 AR-15 AR15 Heckler-&-Koch 16.5" H&K-HK-MR556-A1 H&K

Sold On 11/04/2024

Heckler & Koch MR556A1 AR-15 AR15 Heckler-&-Koch 16.5" H&K-HK-MR556-A1 H&K

Heckler & Koch H&K-HK MR556A1 AR H&K-HK-MR556-A1

Heckler & Koch (H&K-HK) MR556A1 AR-15 AR15 AR H&K-HK MR-556-A1 +ORIG CASE

Sold On 09/16/2024

Heckler & Koch (H&K-HK) MR556A1 AR-15 AR15 AR H&K-HK MR-556-A1 +ORIG CASE

Heckler & Koch (H&K-HK) MR556A1 H&K-HK-MR556A1

Heckler & Koch (H&K-HK) MR556A1 AR-15 AR15 AR 16.5" H&K-HK-MR556A1 MR556-A1

Sold On 08/23/2024

Heckler & Koch (H&K-HK) MR556A1 AR-15 AR15 AR 16.5" H&K-HK-MR556A1 MR556-A1

Heckler & Koch (H&K-HK) MR556A1 MR556-A1 ORIG CASE

LIKE-NEW Heckler & Koch (H&K-HK) MR 556 A1 FDE 5.56 NATO MR-556 A1 MR556A1

Sold On 08/05/2024

LIKE-NEW Heckler & Koch (H&K-HK) MR 556 A1 FDE 5.56 NATO MR-556 A1 MR556A1

RARE Heckler & Koch (H&K-HK) MR 556 A1 MR556A1

Heckler & Koch (H&K-HK) MR556A1 AR-15 AR15 AR H&K-HK MR556 HK416 +ORIG CASE

Sold On 08/02/2024

Heckler & Koch (H&K-HK) MR556A1 AR-15 AR15 AR H&K-HK MR556 HK416 +ORIG CASE

Heckler & Koch H&K-HK MR556A1 MR556 HK416 M4 M4a1

Heckler & Koch (H&K-HK) MR556A1 Competition 5.56 NATO MR556 HK416 ORIG CASE

Sold On 03/22/2024

Heckler & Koch (H&K-HK) MR556A1 Competition 5.56 NATO MR556 HK416 ORIG CASE

Heckler & Koch H&K-HK MR556-A1 MR556 HK-416

Heckler & Koch (H&K-HK) MR556A1 5.56 NATO Piston H&K-HK-MR556A1 MR556 HK416

Sold On 03/15/2024

Heckler & Koch (H&K-HK) MR556A1 5.56 NATO Piston H&K-HK-MR556A1 MR556 HK416

Heckler & Koch (H&K-HK) MR556A1 MR556 +ORIG CASE

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