Unique Features:

• Short-stroke piston gas system
  - Improved reliability
  - 100% function
  - No fouling directed into weapon
  - Less cleaning
  - User removable/exchangeable components
  - Insensitive to barrel length or ammunition changes
• Improved buffer system
• Improved steel magazine:
  - Improved feeding reliability, durability, service life
• Refined barrel/bolt locking recesses/lugs:
  -Improved function
• Improved extractor and spring, buffer:
  -Improved function
• Enhanced AG-C add-on 40mm grenade launcher
• HK cold-hammer forged barrel
  -Extended service life
  -Improved accuracy and user safety
• HK free-floating modular rail system