This kit includes a complete upper receiver/barrel assembly allowing Mil-Spec 5.56mm AR-style rifles to be retrofitted to HKs 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.
HK 51000384 MR556 Upper Receiver Kit 5.56mm for AR15/M16/M4
0 review
★★★★★ Rated 5 out of 5
$2,832.70 Original price was: $2,832.70.$2,179.00Current price is: $2,179.00.
Out of stock
You must register to use the waitlist feature. Please login or create an account
| Brand | HK |
| Category | Uppers |
| Series | Upper Receiver Kit |
| Model | MR556 |
| Caliber | 5.56mm |
| Firearm Fit | AR15 / M16 / M4 |
| Color | Black |
| Length | 16.50″ |
Be the first to review “HK 51000384 MR556 Upper Receiver Kit 5.56mm for AR15/M16/M4” Cancel reply
Related Products
-
Daniel Defense 2314210035 5.56 NATO 18″ Black DLC Cold Hammer Forged Barrel
$2,185.30Original price was: $2,185.30.$1,681.00Current price is: $1,681.00. -
Timber Creek Outdoors ME9HGOD Enforcer OD Green Aluminum
$187.19Original price was: $187.19.$143.99Current price is: $143.99. -
GRIFFIN MK1PSD3UFDE-W PSD 300BO 9.5″ TBRN
$1,543.69Original price was: $1,543.69.$1,187.45Current price is: $1,187.45. -
Cobalt Kinetics CK-PRO-URG-556-16-B-FD CK-Pro Urg 5.56x45mm NATO 16″ Flat Dark Earth Cerakote Receiver
$1,565.65Original price was: $1,565.65.$1,204.35Current price is: $1,204.35.



Reviews
There are no reviews yet.