Hoping to tap into your knowledge and experience.
Thinking about converting an original Colt R6600 which has the A2 carry handle upper to flat top.
I understand not all the ones out there will work because of the difference in hole sizes.
Likely to use the same bbl. What options exist for a stripped flat top upper receiver on an original Colt R6600 which has the A2 carry handle upper?
Thinking about converting an original Colt R6600 which has the A2 carry handle upper to flat top.
I understand not all the ones out there will work because of the difference in hole sizes.
Likely to use the same bbl. What options exist for a stripped flat top upper receiver on an original Colt R6600 which has the A2 carry handle upper?