I'm trying to satisfy my curiosity over the variants of the AR. I was looking at Bushmasters site and they have all kinds of variants. A2 and A3, what's the difference? the pictures look the same.
How many different M4s can you find?
M4
http://www.bushmaster.com/catalog_xm15_BCWA3F14M4IZ.asp
M4 Patrolman
http://www.bushmaster.com/catalog_xm15_BCWA3F16M4.asp
They even have a gas piston model
http://www.bushmaster.com/catalog_xm15_BCWA3F16M4-GP.asp
Competition (A2 and A3)
http://www.bushmaster.com/catalog_xm15_PCWA2S20DCM8.asp
Too many choices...