Product Features & Specifications

HK 81000827 MR556 A4 5.56x45mm 30+1 16.50" Black Threaded Barrel, Black Picatinny Rail, M-LOK Handguard, 6 Position Black Synthetic Stock, Ambidextrous

The MR556 A4 short-stroke gas piston operating system does not impart hot carbon fouling back into the action, allowing the weapon to run longer, with less maintenance and with less wear on internal components.Its adjustable gas regulator allows the operator to tune the action specifically for suppressed or unsuppressed operation.

Fully ambidextrous controls, lighter weight and a slimmer profile make the new A4 easier to operate, manipulate and employ.

Brand	HK
Series	A4
Model	MR556
Caliber	5.56x45mm
Barrel Length Range	16" to 16.99"
Operating System	Gas Piston
Stock Finish Group	Black
Capacity	30+1
Stock Material	Synthetic
Action	Semi-Auto
OAL	36.50"
Hand	Ambidextrous
Sights	None
Barrel Finish	Black
Barrel Material	Steel
Twist	1:7"
Receiver Description	Picatinny Rail
Handguards	M-LOK
Trigger Pull Weight	4.50-5.60 lbs
Grooves	6
Height	7.50"
Safety	Ambidextrous Safety Lever
Thread Pattern	5 / 8"x24
Width	3.07"
Stock Description	6 Position
Barrel Description	Threaded
Barrel Length	16.50"
Max Capacity	30
Receiver Finish	Black
Weight	7.67 lbs
Stock Finish	Black
SKU	172733
UPC	642230269408
MPN	81000827