The Heckler & Koch MR762 A4 is a semi-automatic rifle chambered in 7.62x51 NATO with a 16.5-inch threaded barrel and a 20-round capacity. It has an M-LOK handguard, a Picatinny rail, and a 9-position synthetic stock with finger-grooved grip. The rifle is ambidextrous and finished in black throughout. 
 

Key Specifications 

• Brand: Heckler & Koch 
• Model: MR762 A4 
• Caliber: 7.62x51 NATO 
• Action: Semi Auto 
• Capacity: 20+1 rounds 
• Barrel Length: 16.5 inches 
• Color/Finish: Black 
   

Detailed Features 

• 16.5-inch threaded barrel in black finish 
• M-LOK handguard with Picatinny rail 
• 9-position adjustable synthetic stock 
• Ambidextrous controls 
• Finger-grooved pistol grip

Owners of the MR762 A4 consistently point to the build quality as the main draw. The fit and finish are consistent with what buyers expect from H&K, and the M-LOK handguard and Picatinny rail give good flexibility for optics and accessories without adding bulk.

The 9-position stock is a practical feature that gets mentioned often, particularly by shooters who share the rifle or need to adjust for different clothing. The 16.5-inch barrel is long enough to be comfortable at the range while staying under the thresholds that would add paperwork. Trigger opinions split; some find it crisp and fine for a semi-auto battle rifle, others prefer an aftermarket upgrade.

Value relative to the price is where most debate lives. The MR762 A4 is a premium buy, and shooters weigh the H&K pedigree and 20-round capacity against what other AR10-pattern rifles offer at lower cost. For buyers who want the H&K name and the full feature set in one package, the A4 configuration is typically considered the practical choice in the lineup.