HK MR556A4 Upper Receiver Kit
Specifications
Material 6061-T6 aluminum upper receiver; steel barrel/gas components
WARNING: This product can expose you to chemicals including arsenic, which is known to the State of California to cause cancer. For more information, go to WWW.P65WARNINGS.CA.GOV
Description
Product Overview
The HK MR556A4 Upper Receiver Kit is an HK-engineered replacement or build component designed around the MR556A4 platform’s 16.5-inch configuration. It provides the upper assembly foundation for reliable AR-pattern operation with HK-spec construction materials.
Key Features
- Designed for the MR556A4 platform and 16.5-inch configuration
- Factory-built upper receiver components using aluminum receiver construction
- Steel barrel and gas-system materials for durability and service life
- Upper receiver kit form factor for completing a compatible MR556A4-style build
If you’re building or upgrading an MR556A4-style upper, this HK 51000384 16.5-inch upper receiver kit is a direct platform-matched option.
5.0 | 1 Reviews
- SKU:
- 51000384
- UPC:
- 642230270213
- BUDS ID:
- 178700
Customer Reviews
5.0 out of 5
1 total reviews
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Latest Reviews
Kim P.
6 months ago
Verified Purchaser
Nicest AR 15 upper I...
Nicest AR 15 upper I have in my collection, really expensive but really high quality.
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Retail Availability
Bud's Gun Shop - Lexington, KY
1105 Industry Road, Lexington, KY 40505
Bud's Gun Shop - Sevierville, TN
2270 Two Rivers Blvd, Sevierville, TN 37876
Uncle Lee's - Greenville, KY
820 Main St, Greenville, KY 42345
