Heckler & Koch MR556A1 Upper Receiver Kit .223 Remington/5.56 NATO Black Rifle
Barrel Length: 16 inches
Specifications
Action Semi-Automatic
Finish Black
Optic Ready Yes
Barrel Length 16 inches
Caliber / Gauge .223 Remington, 5.56 NATO
Threaded Barrel Yes
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 Heckler & Koch MR556A1 Upper Receiver Kit provides a complete piston-operated upper assembly for compatible AR-style rifle platforms. The kit includes the MR556A1 upper receiver and 16 inch 4140 steel barrel assembly, complete bolt mechanism, buffer, and action spring. Designed for use with Mil-Std buffer tubes and compatible high-quality AR-style lowers, the assembly features a Picatinny top rail for flexible optic mounting and supports both .223 Remington and 5.56 NATO ammunition.
Key Features
- Complete MR556A1 upper receiver, barrel, and bolt assembly for compatible AR-style rifle lowers
- Short-stroke gas piston system supports clean and reliable operation
- 16 inch 4140 steel barrel balances handling with practical rifle performance
- Compatible with .223 Remington and 5.56 NATO ammunition
- Picatinny top rail provides a secure mounting interface for optics and accessories
- Includes buffer and action spring for installation with compatible Mil-Std buffer tube systems
Pair the MR556A1 Upper Receiver Kit with a compatible AR-style lower receiver to build or retrofit a piston-operated rifle platform.
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Free and Fast Shipping to the Lower 48 States.
- SKU:
- 235975A5
- UPC:
- 642230247048
- BUDS ID:
- 82558
Compatible Ammo
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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
