HK MR556A4 Upper Receiver Kit
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Specifications
Material 6061-T6 aluminum upper receiver; steel barrel/gas components
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.
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
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.
9 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
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