Specifications
| Brand | Heckler & Koch |
|---|---|
| Type | Semi-automatic pistol |
| Caliber | 5.56 NATO |
Product description
H&K MR556 A4 5.56mm Pistol
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. While fully ambidextrous controls, lighter weight and a slimmer profile make the new A4 easier to operate, manipulate and employ.
- Manufactures Item Number: 81001050, UPC: 642230269439 (HK MR556 A4 Pistol – 30 Rd)
- Manufactures Item Number: 81001051, UPC: 642230269446 (HK MR556 A4 Pistol – 10 Rd – Compliant States)
- Caliber: 5.56 NATO
- Length: 26.5 inches
- Barrel Length: 11 inches Hammer forged Cannon Grade Steel Barrel (Life Time Warranty on Barrel Life)
- Barrel Twist: 1:7 inches, 6 lands/grooves
- Operating System: Short Stroke Gas Piston – Adjustable two position gas black
- Controls: Full Ambidextrious
- Sights: No Sights, Optics Ready Picatinny Rail
- Trigger Pull: 4.5 – 5.6 pounds
- Weight: 6.61 pounds
- Handguard: New M-LOK
- Stock: SB Tactical SBA5 Collapsible Brace
- Magazine: One 30 Round
Shipping, returns and FFL transfer
- Firearm: ships only to a licensed Connecticut FFL dealer that you name at checkout. The dealer checks your permit or eligibility certificate, completes ATF Form 4473 and the background check, and charges their own transfer fee. We never ship a firearm to a home address. Shipping and FFL transfers
- Shipping: $29.99 flat per order, free on orders over $999. Orders usually leave within 1–3 business days after payment clears; items from partner warehouses take 1–3 weeks, and we email you if yours will take longer.
- Returns: before the transfer, tell your dealer not to transfer and contact us; a transferred firearm cannot be returned for a refund, but the maker's warranty still applies. Returns and refunds
- Questions: Buying a gun online in Connecticut (FAQ) · Contact us. Secure checkout.
Buying this in Connecticut
Connecticut buyers need a pistol permit or Handgun Eligibility Certificate, and the Connecticut dealer will only transfer this model if it and its magazines (10 rounds or fewer) are legal in Connecticut. Read the guide
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