Extreme Upper dimensions

[trevorjb22]

Does anyone have the measurements for the rail on an Extreme upper. I'm trying to figure out if I can use magpul buis + red dot magnifier + eotech(511 model) or if it would not all fit on the upper without extending onto the handguard.

[VLODPG]

With the MBUS sight on the upper, the distance from the front edge of the sight to the front of the receiver is 4 3/4 "

Just took the measurement off my upper w/MBUS

[trevorjb22]

Ok,
I want to put a Larue FTS mount with a magnifier between the rear mbus and my Eotech(511 model) but I believe the front half of the Eotech will be stradling the front of the reciever and the handguard. If I keep the bolt that secures the EOtech to the rail on the upper reciever rail, would having the front half mounted on the handguard affect accuracy? I've heard that you don't want to mount an EOtech to the handguard becuase of accuracy issues and getting a 5x magnifier behind my EOtech, I want it to be pretty accurate.
Also, does anyone have pictures of setups, like I am contemplating?

[VLODPG]

From what I heard IIRC, you do not want to bridge the optic across the receiver & rail although PRI does something like that with their tube & continuous rail.