HK 81001204 MR556 A4 5.56x45mm 10+1 16.50" Black Threaded Barrel, Patriot Brown Picatinny Rail Receiver, M-LOK Handguard, 6 Position Black Synthetic Stock, Ambidextrous
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HK MR556 A4 Semi-Auto Rifle - 5.56x45mm, 16.50" Barrel, Patriot Brown
The HK MR556 A4 is a precision-engineered semi-automatic rifle featuring a 16.50" threaded barrel and a short-stroke gas piston system that minimizes carbon fouling, enhancing reliability and reducing maintenance. Its fully ambidextrous controls and adjustable gas regulator make it versatile for both suppressed and unsuppressed use. The rifle's lightweight design and M-LOK handguard ensure ease of handling and customization.
Specs:
Technical Specifications
| Caliber | 5.56X45MM |
|---|---|
| Capacity | 10 |
| Barrel Length | 16.50" |
| Action Type | Semi-Auto |
| Weight | 11 lbs |
| Overall Length | 36.50" |
| Barrel Description | Threaded |
| Sights | 1:7" |
| Safety | Ambidextrous Safety Lever |
| Twist Rate | 1:7" |
| Manufacturer | Heckler & Koch |
| Model | 81001204 |
| SKU | S1182806 |
| UPC | 642230271081 |
| Availability | Out of Stock |
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Shipping & Returns
Ships to your local FFL
This firearm ships to a licensed dealer (FFL) near you for pickup, not to your home. You'll choose your FFL during checkout, and if you don't have one in mind, we'll help you find a nearby dealer. You complete the background check and pick it up there.
Shipping Information
- Firearms ship via FedEx or UPS with signature required
- Tracking information provided for all orders
- Shipping costs calculated at checkout based on weight and destination
Return Policy
- Firearms must be returned unfired and in original packaging within 3 days of FFL transfer
- 15% restocking fee applies to all firearm returns
- Contact us for return authorization before shipping items back
- Original shipping costs are non-refundable
Questions?
Contact us at 256-962-0301 or submit a question for assistance with shipping or returns.
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