H&K 81000584 MR556A1 URK, Upper Receiver Kit, .223 Remington | 5.56 NATO, Matte Black, M-Lok Handguard, 16.5 Inch Barrel
Shop Heckler & Koch ProductsThis item is currently out of stock. Enter your email below and we'll notify you when it's available!
We'll only use your email to notify you about this product.
Heckler & Koch MR556A1 Complete Upper Kit, 5.56x45mm, 16.5" Barrel, MFG# 81000584, UPC: 642230262607
The Heckler & Koch MR556A1 Complete Upper Kit is a high-performance, piston-driven upper designed for AR-15 platforms. Featuring a 16.5" medium contoured barrel and a short stroke gas piston system, this upper ensures reliability and accuracy. The lightweight, free-floating M-LOK handguard enhances adaptability, while the improved charging handle allows for easy one-handed operation. Built with precision machined aluminum, this upper is engineered for durability in the field.
Specs:
Technical Specifications
| Caliber | .223 Remington / 5.56 NATO |
|---|---|
| Finish | Matte Black |
| Weight | 3.00 oz |
| Manufacturer | Heckler & Koch |
| Model | 81000584 |
| SKU | C1143331 |
| UPC | 642230262607 |
| Availability | Out of Stock |
Customer Reviews
No reviews yet. Be the first to review this product!
Product Discussion
Questions or comments about this product? Join the discussion below. Please review our Community Guidelines before posting.
Shipping & Returns
Shipping Information
- Orders typically process within 1-2 business days
- Ships via major carriers with tracking
- Tracking information provided for all orders
- Shipping costs calculated at checkout based on weight and destination
Return Policy
- 30-day return policy on accessories and non-firearms
- Items must be unused and in original packaging
- Contact us for return authorization before shipping items back
- Original shipping costs are non-refundable
Questions?
Contact us at 502-272-4859 or submit a question for assistance with shipping or returns.
What is MAP Pricing?
MAP stands for Minimum Advertised Price. It's a policy set by manufacturers that limits how low retailers can advertise their prices.
The good news? We can often sell below MAP - we just can't show that price publicly. When you request a price by email or add to cart, you'll see our actual (often lower) price.
This isn't a trick - it's how we stay compliant while still offering you the best deals possible.