In StockSave 13%
Heckler and Koch MR556 A4 5.56 16.5 Barrel 30-Rounds
Sold byGrabAGun•Posted Apr 27, 2026
Compare prices for HK MR556 A4 Semi Automatic Rifle 5.56x45mm NATO 16.5" Black Threaded Barrel Matte Frame Black Stock Pistol Grip 30+1$3,749.00
$4,299.00
You save $550.00 (13% off)
Price and stock data refresh continuously from GrabAGun.
Deal Summary
- Currently in stock.
- Caliber: 223/5.56
- Category: parts
- UPC: 642230269408
- SKU: GAG_81000827
- Brand: Hk
Price History
Deal Details
Heckler & Koch MR556 A4 Features Built to exacting standards the MR556 A4 employs a proprietary short-stroke gas piston system derived from the legendary HK416 ensuring cleaner and more reliable operation. The rifle's cold hammer-forged barrel enhances durability and accuracy while the free-floating handguard provides superior ergonomics and customization with ample rail space for mounting accessories. The MR556 A4 also includes ambidextrous controls for enhanced usability making it an id
Other Offers for This Product
Active offers from your catalog for HK MR556 A4 Semi Automatic Rifle 5.56x45mm NATO 16.5" Black Threaded Barrel Matte Frame Black Stock Pistol Grip 30+1.
Comparing 6 retailers carrying this product
Lowest Price: $3,449.00
Highest Price: $3,749.00
You Save: $300.00
Avg Discount: 7% off
HK MR556A4 16.5" 5.56 NATO Rifle, Black - 81000827
H&KPalmetto State ArmorySKU/UPC: 51655173935
$3,449.00$4,158.99Save 17%
View at Palmetto State Armory
HK 81000827 MR556 A4 5.56x45mm 30+1 16.50 Black Threaded BBL, Black Pic Rail, M-LOK Handguard, 6 Position Black Synthetic Stock, Ambidextrous,Tactical Rifles
Heckler & KochHinterland OutfittersSKU/UPC: 226860
$3,497.00
View at Hinterland Outfitters
Heckler and Koch MR556 A4 5.56 16.5 Barrel 30-Rounds
Heckler And KochGrabAGunSKU/UPC: GAG_81000827
$3,749.00$4,299.00Save 13%
View at GrabAGun
Heckler & Koch MR556 A4, 5.56 NATO, 16.5 Barrel, 1-30rd Magazine, Rifle
Heckler & Koch, Inc.BattleHawk ArmorySKU/UPC: 642230269408
$3,749.00$4,299.00Save 13%
View at BattleHawk Armory
HK MR556 A4 Semi Automatic Rifle 5.56x45mm NATO 16.5" Black Threaded Barrel Matte Frame Black Stock Pistol Grip 30+1
HkMidwayUSASKU/UPC: 427243
$3,749.00
View at MidwayUSA