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“Spikes STU5025M4S Complete Upper 5.56x45mm NATO 16″ Black Phosphate Barrel, 7075-T6 Aluminum Black Receiver, M4 Double Head Shield Handguard for M4 Carbine” has been added to your cart. View cart

HK UPPER MR556A4 5.56 16.5″ BLK

HK UPPER MR556A4 5.56 16.5″ BLK

SKU: RSR|HK51000384 Category:

HK UPPER MR556A4 5.56 16.5″ BLK

$2,179.00

In stock

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Additional information

UPC

642230270213

Manufacturer

Heckler & Koch / H&K

Manufacturer Part Number

51000384

Barrel Finish

Stainless

Barrel Length

16.5

Barrel Material

STEEL

Caliber/Gauge

.223 REM/5.56 NATO

Dimension

4.50 X 13.80 X 43.95

Height

4.5000

Length

43.9500

Other Features

FORWARD ASSIST

Width

13.8000

Product Type

Upper

Color

BLACK

Finish

Anodized

Fit

AR-15

Model

MR556 A4 Upper Receiver

Subcategory

Complete Upper Receivers

Finish Type

Black

Shipping Weight

11.3

Scope Cover Included

False

Rate of Twist

1-in-7"

Package Width

13.5

Package Length

43.75

Package Height

3.5

Illuminated Reticle

False

Drilled and Tapped

False

Adjustable Objective

False

Additional Feature 2

M-Lok Handguard

Additional Feature 1

Includes Bolt and Buffer