Hey guy's check this link- they have several flip up sights but not sure if this is the real deal or not. If so I paid far more for mine. They look like the Knight's 300 and 600m flip up sights for $89, and $109. I just checked my Knights 600m BUIS and I think this is the real deal for $109 plus they have the regular 300m Knights for $89.  I have never bought from these guys I just saw this and passed it along.

Cut and copy if my link doesn't work:

http://www.veriforcetactical.com/gun_accessories/AR15_M4_M16/FLIP%20UP%20SIGHTS/62/

http://www.veriforcetactical.com/tactical_accessories/534/

they are not KAC parts

look at the screw for the clamp.  dead give away right there.

It's nothing but a copy of the real thing.

ETA: the top collar area doesn't look right either.

I've seen REAL 300m's here on the EE for $50 - 100

Just keep your $$$ here, you won't regret it!

i will sell you my kac 600m buis, for 100$ shipped

Quoted: i will sell you my kac 600m buis, for 100$ shipped

sell it to me (if it is real)

What kind is it then? It looks just like my KAC model except the thumb screw deal which I thought was an upgrade. I'll call and find out monday.

I guess the real question is: depending on use, why wouldn't these work?

other than the "clone war", if your looking for some lo-pro back up sights, try 'em out...