HK PARTS AND ACCESSORIES FOR SALE
Original HK MR556 upper sent off to IGF to reprofile to 416 specs, the work includes:
Chop to 10.4"
Turned down to thin profile barrel
Removed MR556 tab from the extension
Shaved sling loops from the gas block
Nitride treat the barrel
The safety lever was removed from the BCG so you can use...