This is my first post on this site. I have built only 3 AR's but that number is going up, up, up, I now have 5 stripped lowers and 3 stripped uppers , 2 flat top and 1 A2. please excuse me for asking a question that I'm sure has been asked over and over.. :D
I have a spare A2 upper and It seems everyone is making barrels with the M4 barrel extensions now. can some tell me if a barrel with the m4 barrel extention will work with thw A2 still upper receiver?
what the heck I would like to know if a A2 barrel extension will work on a M4 type receiver also, seems I read somewhere it would not, but cant remember. and can find nothing on web search
thanks for all replies