In this topic: You name the guns you can't ever identify right.

[MT2008]

Originally Posted by Excalibur

Can't tell the difference between some of the shorty M16 models like the 727s to the sporter carbines

The 727 is easy; it has the stepped barrel, like an M4.

The others, I admit I don't know them all, either. Which is why I like the AR chart.