(903) 259-6600|Tue–Fri 10am–6pm · Sat 10am–5pm|2510 Hemphill St., Greenville, TX
(903) 259-6600|Tue–Fri 10am–6pm · Sat 10am–5pm|2510 Hemphill St., Greenville, TX
$3,749.00
HK MR556 A4 556NATO 16.5″ 30RD BLK
Warehouse inventory: Out of stock
Store inventory: Not in store
The latest update from HK-USA to the commercial variant of the legendary HK416″ the MR556 A4 and MR762 A4 represent an enhanced example of no compromise HK performance. Its 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 than direct-impingement ARs. 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 A4 easier to operate, manipulate and employ. For those who demand an AR with unmatched capability and uncompromising reliability and durability, the MR A4s remain the top tier solution.
| upc | 642230269408 |
|---|---|
| manufacturer | Heckler & Koch / H&K |
| Manufacturer Part Number | 81000827 |
| Action | Semi-Auto |
| ATF Type | Rifle |
| Barrel Length | 16.5" |
| Caliber/Gauge | .223 REM/5.56 NATO |
| Capacity | 30 + 1 |
| Length | 43.8000 |
| Model | MR556 A4 |
| Number of Magazines | 1 30 rd. |
| Package Height | 4.1 |
| Package Width | 13.2 |
| Product Type | Rifle |
| Rate of Twist | 1-in-7" |
| Safety | Ambidextrous Safety Lever |
| Shipping Weight | 14.5 |
| Sights | No Sights |
| State Restriction (CA) | NO DIRECT SHIP TO CALIFORNIA |
| State Restriction (IL) | NO SALE TO ILLINOIS PICA |
| State Restriction (RI) | NO DIRECT SHIP TO RHODE ISLAND |
| State Restriction (WA) | NO DIRECT SHIP TO WASHINGTON |
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June 11, 2026
The federal suppressor tax stamp dropped from $200 to $0 in 2026, making suppressor ownership more accessible than in decades.
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June 11, 2026
The DOJ and ATF announced sweeping reforms to modernize firearms rules and ease compliance burdens on gun owners and FFLs.
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