...ok well i'll bring everything back on topic.
I've used a CA m15a4 carbine and own an TM AUG, personally I preffer my AUG for its accuracy, it's barrel is much longer and its overal length is the same, that is my only problem with the gun. The m15, unlike my AUG

, is very easy to find parts for (internally and externally) and quite well built. So basically it comes down to whether or not you want allot of accuracy because the m15 has everything else.