Please be aware that all online pricing and inventory numbers are valid for online purchases only. Availability and pricing may be different on in-store items.



HK MR556A1 Competition

Product Code : 642230251892


Mfg Item #: CR556-A1

Available Online
Secure online ordering

A direct descendant of the HK416, the MR556A1 Competition is a semi-automatic rifle developed as a premium level commercial/civilian firearm with match rifle capability. The MR556A1 uses the HK proprietary gas piston operating system, employing a piston and a solid operating pusher rod in place of the gas tube which virtually eliminates malfunctions common to direct impingement gas systems since hot carbon fouling and waste gases do not enter the receiver area. It uses the HK Free Floating Rail System (FFRS) handguard with four MIL-STD-1913 Picatinny rails, and a machined Picatinny rail on the upper receiver. Major sub assemblies, including the MR556A1 upper receiver/barrel assembly, are fully interchangeable with other high quality AR-style firearms. The thick, heavy contour 16.5" barrel has 6 lands and grooves with a 1:7 " twist, and is moderately swagged with a slightly smaller internal diameter at the muzzle end than the chamber end for better bullet accuracy and velocity. A precise, enhanced two-stage trigger adds significantly to the accuracy of the MR556A1, and an extended latch charging handle makes operating the rifle with a telescopic sight easier. The retractable buttstock can be locked into a solid, non-moving position by tightening an Allen screw in the bottom of the stock. Special target rifle take-down pins ensure the upper and lower receivers are firmly mated for accurate performance. Designed to function with a wide variety of high quality 5.56x45mm ammunition, the MR556A1 uses a C.I.P. dimensioned chamber, and functions reliably with most quality 223 Remington ammunition. The MR556A1 is produced in the USA using American and German made components.

Caliber223 Remington/5.56 NATO
Barrel Length16.5"
TriggerTwo Stage
Weight8.8 lbs
Stock Description6-Position Black
Metal FinishBlack
MuzzleA2 Muzzle Brake
Receiver MaterialAlloy
SightsFlip-Up Front and Rear
Barrel DescriptionFree-Floating
Barrel Length Range16.00" to 17.99"
Weight Range8.00 lbs to 9.99 lbs
Stock Finish GroupSynthetic
Metal Finish GroupBlued/Black

Determined at checkout.