Retains forward assist function
Bought a barrel, gas black and this from MWS, the carrier is super slick and ultra light I think like 10oz. After talking to the owner Ian he helped me to adjust the gas and make this carrier really shine. I had no idea that I could run a lightweight carrier and now I understand what it does. Thought it was just a fad, but after adjusting everything the recoil of my 556 feels like a pellet gun going off. Like zero recoil! I cannot believe the difference. Everyone told me not to go lightweight because it would not work. Found out they are all wrong and don't know what they are talking about. What a surprise.
I have over 5000 through my Colt H-Bar using this bolt. It runs flawlessly in every environment. With it being lighter I can say there is a definite reduction in felt recoil