I believe there is not. This is the exact same rear sight now used on M4s in the US Army paired with the standard gas block mounted front sight post seen on most ARs. It makes an accurate and durable set of backup sights if you combine the two.
F height front sight is needed
This is a very good sight, a little bulky, but other than that, it works very well. I have a Magpul Gen 1 flip up front sight and have it sighted in for 50 yards. A fifty yard zero is supposed to be close to a 200-yard zero so I have mine zeroed at that range. Mine has held a zero very well for five years, I check it now and then when I take my Colt to the range. It does need to be lubricated now and then but other than that, it would be hard to beat this rear sight for accuracy.
They use a knights armament front sight
I believe a front flip up sight will work. Also, these 200 - 600 markings are in metric in case anyone was wondering.