HK MR556 A4 16.5" Upper Receiver Kit
SKU: 51000384
was:$1,999.99
$1,874.99
MR556 A4 16.5" Upper Receiver Kit
Shipping Size: Extra Large
Allow International Shipping: No
Color: Black
Country Of Origin: USA
Manufacturer Model No: 51000384
Condition: New
Model: MR556 A4
Product Description:
View Product
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. Upper will ship in HK Soft case.