Out of StockSave 13%
Heckler and Koch MR556A4 5.56 16.5 Barrel 10-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 20+1$3,749.00
$4,299.00
You save $550.00 (13% off)
Price and stock data refresh continuously from GrabAGun.
Deal Summary
- Currently marked out of stock.
- Caliber: 223/5.56
- Category: gear
- UPC: 642230269415
- SKU: GAG_81000828
- Brand: Hk
Price History
Deal Details
Heckler & Koch MR556 A4 Features The MR556 A4 employs a proprietary short-stroke gas piston system derived from the iconic HK416 ensuring superior reliability and reduced fouling for easier maintenance. Its cold hammer-forged barrel enhances accuracy and extends barrel life while the free-floating handguard offers improved handling and customization options with ample Picatinny rail space. The rifle features ambidextrous controls making it convenient for both right and left-handed shooters
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 20+1.
Comparing 6 retailers carrying this product
Lowest Price: $3,264.99
Highest Price: $3,749.00
You Save: $484.01
Avg Discount: 4% off
HK USA MR556 A4 5.56 NATO 16.5" 10rd - Black
Hk UsaKYGUNCOSKU/UPC: HCK-81000828
$3,264.99
View at KYGUNCO
HK 81000828 MR556 A4 5.56x45mm 10+1 16.50 Black Threaded BBL, Black Pic Rail, M-LOK Handguard, 6 Position Black Synthetic Stock, Ambidextrous,Tactical Rifles
Heckler & KochHinterland OutfittersSKU/UPC: 226861
$3,497.00
View at Hinterland Outfitters
Heckler and Koch MR556A4 5.56 16.5 Barrel 10-Rounds
Heckler And KochGrabAGunSKU/UPC: GAG_81000828
$3,749.00$4,299.00Save 13%
View at GrabAGun
MR556 A4 5.56 16.5 10+1 BLK
Heckler & Koch, Inc.BattleHawk ArmorySKU/UPC: 642230269415
$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 20+1
HkMidwayUSASKU/UPC: 478651
$3,749.00
View at MidwayUSA