All machine guns require require routine maintenance and upkeep to maintain optimal performance. This includes replacing high stress wear parts when they reach the end of their service life. Different parts require replacement at different round counts. IDS offers replacement kits for each round count interval, and can be ordered using the list below:

20,000 ROUND SERVICE KIT
Part Number: IDS20000556OB

BARREL ASSEMBLY, 5.56MM, 18 IN.
Part Number: 12011986

BOLT ASSEMBLY, 5.56mm, OPEN BOLT
Part Number: 9348412

RECOIL SPRING, 5.56mm, OPEN BOLT
Part Number: 9348452

EJECTOR ASSEMBLY, 5.56mm
Part Number: 9348223.2

40,000 ROUND SERVICE KIT, 5.56mm, OPEN BOLT
Part Number: IDS40000556OB

BARREL ASSEMBLY, 5.56MM, 18 IN.
Part Number: 12011986

BOLT ASSEMBLY, 5.56mm, OPEN BOLT
Part Number: 9348412

SLIDE ASSEMBLY, 5.56mm, OPEN BOLT
Part Number: 9348391

RECOIL SPRING, 5.56mm, OPEN BOLT
Part Number: 9348452

EJECTOR ASSEMBLY, 5.56mm
Part Number: 9348223.2

100,000 ROUND SERVICE KIT, 5.56mm, OPEN BOLT
Part Number: IDS100000556OB

BARREL ASSEMBLY, 5.56MM, 18 IN.
Part Number: 12011986

BOLT ASSEMBLY, 5.56mm, OPEN BOLT
Part Number: 9348412

OP ROD/CARRIER, 5.56mm, OPEN BOLT
Part Number: 9348405

RECOIL SPRING, 5.56mm, OPEN BOLT
Part Number: 9348452

EJECTOR ASSEMBLY, 5.56mm
Part Number: 9348223.2

GAS CYLINDER, IMPROVED
Part Number: 9348345.M

SEAR
Part Number: 9348368

SAFETY SPRING
Part Number: 9348365

FEED PAWL ASSEMBLY, 5.56MM
Part Number: 9348278

CARTRIDGE PAWL, FRONT
Part Number: 9348294

CARTRIDGE PAWL, REAR
Part Number: 9348295

CARTRIDGE PAWL SPRINGS
Part Number: 9348296

DRIVE LEVER SPRING
Part Number: 9348300

FEED TRAY, 5.56mm
Part Number: 13013736