HK 81001051 MR556 A4 5.56x45mm 10+1 11" Black Threaded BBL, M-LOK Handguard, Black Pic Rail Rcvr, Black Pistol Tube, Black Polymer Grip, Ambidextrous,Tactical Pistols

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.

Height:	7.50"
Weight Range:	6 lbs to 6.99 lbs
Stock Description:	Pistol Tube
Stock Material:	Synthetic
Caliber:	5.56x45mm
Operating System:	Gas Piston
Grips:	Black Polymer
Stock Finish:	Black
Twist:	1:7"
Width:	3.07"
Barrel Length Range:	11" to 11.99"
Handguards:	M-LOK
Series:	A4
Hand:	Ambidextrous
Barrel Material:	Steel
Grooves:	6
Weight:	6.61 lbs
Receiver Description:	Picatinny Rail
Barrel Finish:	Black
Model:	MR556
Barrel Length:	11"
Thread Pattern:	5/8"x24
OAL:	26.50"
Safety:	Ambidextrous Safety Lever
Action:	Semi-Auto
Capacity:	10+1
Receiver Finish:	Black
Trigger Pull Weight:	4.50-5.60 lbs
Max Capacity:	10
Sights:	None
Barrel Description:	Threaded