can anyone supply a picture of an a2 vs an a3 trying to explain to my brother-in-law the difference. also correct me if i am wrong but can't you just buy an upper and change calibers like .223 to .22lr
Go here, see picture slightly down the thread. A2 is on top, A3 is below.Google Image Result for http://www.innovativetactical.com/catalog/images/bushmaster/b74u4s91h09.jpg
