[oniwagamaru]

hahaha nice catch on the shell deflector(the nib thing you are referring to). that is indeed one of the "improvements" they made one the C7 when they designed (ermmm redesigned I should say) the rifle. notice however that the m16a2's iron sights have a windage adjustment wheel that both the M16a1 and the C7 do not have. They retained the m16a1's rear sights instead of adopting the A2's rear sights. So both in retrospect the three rifles vary in small details but hey we are just discussing details right. On my defense though I was talking about the carry handle so it was probably wrong of me to say the whole upper receiver.