a2 vs. a3

[bvillars]

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

 

[kingofwylietx]

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

 

[bvillars]

thanks for the info