Thread: NEA AR 18'' barrel re-profile

I got the barrel back after ceracoat and re profile very pleased with the result. it is a lot lighter than previously, So all assembled and went to the range for testing .
After testing and adjusting the gas block with suppressor fitted at 50m i set the target up at 100m.
Settling down careful 3 round group using 60grain hornady softpoint, the first group was outstanding of less than 1/2 inch. Next few groups opened up to 3/4 inch and just on 1 inch and at this stage getting heat mirage off the suppressor. With the armaworx gas block and the adjustment open between 1/4 and 1/2 turn ejection is around 1 meter at 4 0clock and cycling is perfect.