This is so awesome. This is one of the coolest things about ECF, everyone getting together and sharing knowledge and tips about stuff.
So, a few people here have mentioned the floating pin on the M16. Just last night I was looking at another clone of the same mod online, and saw that it said it had a floating pin and wondered if mine did. No luck the first try, but I tried again tonight after revisiting this thread and discovered omg it DOES! I can totally fit my Kayfun on there now, completely flush! The pin is in there really snug, like, super snug - I mean, I'd hardly call it 'floating'. I had to push it down with the pointy end of my nail clippers, which is probably the best way since those threads are kind of delicate and you don't want to strip them. But it is adjustable. Thank you, ECF! You folks just added some new life to my M16