HK MR556A1 M-LOK 5.56 NATO Rifle
Caliber: 5.56 NATO · Capacity: 30+1
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Specifications
Action Semi-Automatic
Ambidextrous Safety Yes
Barrel Length 16.5 inches
Caliber / Gauge 5.56 NATO
Capacity 30+1
Finish Black
Grip Safety No
Magazines Included 1
Manual Safety Yes
Optic Ready Yes
Overall Length 32.5 inches
Sights Standard Sights
Threaded Barrel Yes
Trigger Safety No
Weight 8.6 pounds
Description
Product Overview
The HK MR556A1 M-LOK is a semi-automatic rifle derived from the HK416 and built around Heckler & Koch's short-stroke gas-piston operating system. Its closed piston system keeps propellant gases out of the receiver, helping the rifle run cleaner and cooler in demanding conditions. The 16.5-inch cold hammer-forged, cannon-grade steel barrel features a 1:7 twist and taper-bore profile for consistent accuracy and long service life. A six-position adjustable stock, M-LOK handguard, ambidextrous controls, continuous top rail, and threaded muzzle provide a flexible configuration for training, duty, and recreational shooting.
Key Features
- HK short-stroke gas-piston system keeps the receiver cleaner and reduces heat during operation.
- 16.5-inch cold hammer-forged barrel with a 1:7 twist supports durable, consistent performance.
- M-LOK handguard and continuous top rail provide flexible accessory and optic mounting.
- Six-position synthetic adjustable stock accommodates different users and shooting positions.
- Ambidextrous manual safety and controls support left- and right-handed operation.
- Includes one 30-round magazine and features a threaded muzzle for compatible accessories.
The HK MR556A1 M-LOK combines HK416-derived operating components with a durable, configurable rifle platform for serious range and field use.
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
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- SKU:
- 81000533
- UPC:
- 642230260221
- BUDS ID:
- 411559471
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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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| Action | Semi-Automatic | Semi-Automatic | Semi-Automatic | Semi-Automatic | Semi-Automatic |
| Ambidextrous Safety | Yes | Yes | Yes | Yes | Yes |
| Barrel Length (in.) | 16.5 | 16.1 | 16.1 | 16.1 | 16.0 |
| Caliber / Gauge | 5.56 NATO | 5.56 NATO | 5.56 NATO | .223 Remington, 5.56 NATO | 5.56 NATO |
| Capacity | 30 | 30 | 30 | 30 | 30 |
| Finish | Black | Tungsten Grey | Black | Brown | Black Anodized |
| Manual Safety | Yes | Yes | Yes | Yes | Yes |
| Optic Ready | Yes | Yes | Yes | Yes | Yes |
| Overall Length (in.) | 32.5 | 32.25 | 32.5 | 32.5 | 36.5 |
| Sights | Standard Sights | Standard Sights | Standard Sights | Standard Sights | Standard Sights |
| Threaded Barrel | Yes | Yes | Yes | Yes | Yes |
| Weight (lbs) | 8.6 | 7.3 | 7.3 | 7.3 | 7.7 |
| Actions | Current Item |
