HK UPPER MR556A4 5.56 11" BLK

HK UPPER MR556A4 5.56 11" BLK

Heckler & Koch
SKU:
HK51000385
|
UPC:
642230270220
$2,179.00
$2,499.00
(You save $320.00 )
(No reviews yet)
Width:
12.50 (in)
Height:
3.75 (in)
Depth:
31.25 (in)
Current Stock:

Out of stock

Out of Stock
Description
The MR556 upper receiver kit has been updated to include all the new A4 features, including new barrel profile, adjustable gas block, handguard and more. This kit includes a complete upper receiver/barrel assembly, allowing Mil-Spec 5.56mm AR-style rifles to be retrofitted to HK's piston and pusher rod system. This system utilizes a piston and a pusher rod in place of the gas tube normally found in AR15/M16/M4-style rifles. This closed system virtually eliminates the malfunctions that are common in direct-impingement gas systems, since hot carbon fouling and waste gasses are not propelled into the receiver area to operate the action. This is the same key feature critical to the success of the HK416 used by elite military and law enforcement customers. The MR556 A4 is assembled in the USA using US and German-made components and uses many of the same parts and assemblies originally developed for the HK416. It functions reliably and shoots accurately with a wide variety of quality 5.56mm or .223 ammunition. Due to the shortened length of the HK buffer and action spring, these parts do not work in fixed-stock AR/M16- type rifles. Installation of Mil-Spec hammers on non-HK lower receivers is required for reliable function.

Features :
  • Suppressor-ready Concentric 1/2X28 Threads
  • Adjustable Gas Regulator for Shooting Suppressed and Unsuppressed
  • M-LOK Interface with Integral Ambi QD Cups
  • Continuous Picatinny Rail Interface Between Upper Receiver and Handguard
  • Extended, Ambidextrous
  • Charging Handle with Dual Claws
  • Match Rifle Cold Hammer-forged Barrel
Additional Information
Model:
MR556 A4 Upper Receiver
Color:
Black
Subcategory:
Complete Upper Receivers
Type:
Upper
Fit:
AR-15
Caliber:
556NATO
Finish:
Anodized
Barrel Length:
11"
Manufacturer Part #:
51000385
Ground Only:
N
NFA:
N
Dropshippable:
N
Exlusive:
N
Closeout:
N
Coming Soon:
N
Items Per Case:
0
Items Per Unit:
0
Case Weight:
0.00
Case Width:
0.00
Case Height:
0.00
Case Length:
0.00
New Item:
Y
Talo Exclusive:
N
UoM:
EA
LeResale Only:
N
Allocated:
Y
Department Name:
SBR Barrels & Upper Receivers
DropShip Block:
Y
Hazard Warning:
WARNING: This product can expose you to lead, which is known to the State of California to cause cancer and reproductive harm. For more information, visit www.p65warnings.ca.gov