Heckler & Koch MR556 A4 .223 REM/5.56 NATO

The Heckler & Koch MR556 A4 is a semi-automatic firearm chambered in .223 REM/5.56 NATO and built for range use, competition, and training. Its 11″ barrel and compact profile make it suitable for disciplined target work and applications where a shorter overall length is desired.

The MR556 A4 pairs a rugged gray Cerakote finish with an HK416 upper receiver and a fully ambidextrous lower receiver for user adaptability. Ergonomics include an HK enhanced ergonomic grip and a collapsible/folding stock configuration, while the M-LOK handguard and a threaded 1/2×28 barrel support a variety of accessory options. This configuration ships with one 30-round magazine and does not include factory sights.

Key Specifications

• The caliber/gauge is .223 REM/5.56 NATO.
• The action is Semi-Auto.
• The barrel length is 11″.
• The capacity is 30 + 1.
• The rate of twist is 1-in-7″.
• The overall length is 26.5″.
• The weight is 6.61 lbs..
• The finish is Gray Cerakote.
• The NFA thread pattern is 1/2×28.
• The number of magazines included is 1 30 rd..

This configuration does not list any state-specific sales restrictions in the provided attributes.

Buy the Heckler & Koch MR556 A4 .223 REM/5.56 NATO online today for a compact, configurable platform that emphasizes adaptability and modular accessory support.