HK 81001201 MR556 A4 5.56x45mm 30+1 11" Black Threaded BBL, M-LOK Handguard, Patriot Brown Pic Rail Rcvr, Black Synthetic 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.

Handguards:	M-LOK
Series:	A4
Barrel Length Range:	11" to 11.99"
Width:	3.07"
Barrel Material:	Steel
Grooves:	6
Hand:	Ambidextrous
Caliber:	5.56x45mm
Stock Material:	Synthetic
Stock Description:	Pistol Tube
Weight Range:	6 lbs to 6.99 lbs
Height:	7.50"
Twist:	1:7"
Stock Finish:	Black
Grips:	Black Polymer
Operating System:	Gas Piston
Action:	Semi-Auto
Capacity:	30+1
OAL:	26.50"
Safety:	Ambidextrous Safety Lever
Barrel Length:	11"
Thread Pattern:	5/8"x24
Barrel Description:	Threaded
Sights:	None
Max Capacity:	30
Receiver Finish:	Patriot Brown
Trigger Pull Weight:	4.50-5.60 lbs
Model:	MR556
Barrel Finish:	Black
Receiver Description:	Picatinny Rail
Weight:	6.61 lbs