View Full Version : VLTOR CASV-EL BUIS

10-17-2009, 12:33 AM
What back-ups do you guys recommend/use with the CASV-EL I have heard some like the MBUS wont fit. Looking for some that aren't too expensive as they are back-ups after all. I am keeping the normal front sights.

10-17-2009, 2:25 AM
I have the CAS-V and it raises the rails on the flatop. I just got a larue fixed rear BUIS. It doesn't fold down, but I cowitness it with my AImpoint. The aimpoint has to be mounted on a lower mount to get it to cowitness right though.

10-17-2009, 6:20 AM
the A.R.M.S. 40L is perfect for the CASV-EL.

you can see them here on some of my old set-ups.



10-17-2009, 10:06 PM
I use a troy flip up in the rear and works great. To bad they are $140.00.

10-17-2009, 11:04 PM
Yea the few sights that seem to work with the rail are all 100$ or more it seems.

10-19-2009, 10:42 AM
A BUIS that covers more than 1 slot won't fit behind the CASV-EL.

The ones I'm aware of that have too large a footprint are the PMAG MBUS and the Matech.

10-19-2009, 11:45 AM

Castle nut is on backwards.

10-19-2009, 12:58 PM
that was my first build, it's long since gone now.

10-19-2009, 1:19 PM
I recommend the KAC 600m BUIS (http://www.operationparts.com/KAC_KNIGHTS_600M_FLIP_UP_REAR_IRON_SIGHT_BUIS_p/98474.htm) as the perfect absolute cowitnessing choice for this setup.

Reg'd cali a.w.:


armalite upper, casv-el, vortex
Aimpoint CompM3 in GG&G mount
White Oak tuned RRA 2 stage
ergo grip, gapper, accuwedge
bobro shorty
vltor flash mount + G2 light

(upgrades not pictured: ctr stock, side sling adapter, ambi selector)


I think my castle nuts are backwards on all of my rifles. I don't think it matters...

10-19-2009, 4:02 PM
aww you have the same rail i am planning to get. Love it.

10-19-2009, 8:52 PM
Veggie, check this thread:


Here's the current furniture:
I mostly don't run with a VFG on the CASV because the side rails act as a positioning index.



The sling is a specter 3 point. I like it more than the magpul ms2 for walking around all day because of the wider strap. It is somewhat less tacticool... but it works, and I've figured out weak side transitions, mostly.

Here's a good video review of the sling:


I like the GG&G mount for the aimpoint as it holds a spare battery (actually needed it once! despite ACET/5 year battery life or whatever).

You can take it on and off the same gun and it holds zero... and I haven't been able to break it yet.

There is an ambi daniel defense burnsed loop on there I don't need, but haven't gotten around to it. Perhaps I'll put the castle nut on backwards next time :)